I believe the question actually is- "How have you changed as a Human Being?"
Why? Because you are not the same person that you were when you started playing the bass. I started in 1967. You are not the same musician you were then, either. A LOT has changed. The World we live in is vastly different. In some ways, a lot better..sadly and tragically, now all overshadowed by the evil and the ominous times we live in now. Society is, for the most part, reflected in the Art it produces. Some observations, from memory, of course. Forgive the stupidity of them, when you are 15- 16, your 'other' head does a lot of your thinking for you. This is NOT a political rant- but you will also change many of your political beliefs as you age.
1. The desire to do something that attracts girls, money, and some modicum of fame and fortune, is a powerful incentive to learn to play an instrument. You also really dig that instrument, for many reasons. The sound, look, and place in music.
2. People need to have SOMETHING important, and fulfilling to DO. Working a day job in a dungeon warehouse, or at some tech job where you make six figures, but hate your life, is not either. We need a purpose to our existence. Making music, and sharing it- is one of the most rewarding, fulfilling, and timeless Human endeavors.
3. What you think is important at 18, is not what is important at 70. I know more doctors than bandleaders now.
4. Chasing women, stardom, money, and the stupid crap your ego drives you to, will waste countless hours of your precious limited time in life.
5. Being 'better' than other musicians, is insane folly. There is really no such thing. Is Charles Berthoud 'better' than Anthony Jackson? Stop trying to prove your genius to everyone in the room... it's like trying to teach a pig to sing- it wastes your time, and pisses off the pig. If you play, and enjoy it- regardless of your level and chops- be glad you have been blessed with that. Many do not have that ability.
6. Playing with people who treat you badly, because they are great musicians, or they keep you working, is something that will fry your brain in time. NEVER take crap from anyone. This is not the military, it's music. Quit those scumbags while you can.
Play with people that actually like you, and treat you with respect.
When I started, even the most innovative bass players like Entwistle, McCartney, Joe Osborn, Glen Cornick, Chris Squire, and of course, many more- still were playing bass in the 'traditional' sense, all in bands, or on session recordings. Today, players like Berthoud, and others have made themselves You Tube/ social media stars, never showcasing their ensemble abilities- just using the bass as a stand alone solo instrument, as if it were a piano. Times, and players, and technology, have changed. Radically, from the 60's to now.
The technology- is amazing now. Wide 6's, fanned frets, preamps.. man.. a lot is different. My first amp, was a 30 watt Supro Thunderbolt. Sounded awful for bass. Then, an Ampeg BT-15C, about 150 pounds, and I loved it... I WAS strong enough to move it anywhere. Next was a'69 SVT.. same thing, but now- I own light weight neo cabs, and ' Class 'D' 'switching' heads.
In addition, before my involuntary semi-retirement, most of the gigs I was playing, were in-ears.
About ten years ago- I had, and still sometimes have, a huge issue with 'soundmen' that use the ridiculous power of subwoofers to prioritize what THEY believe is the real important bass in bands- the bass DRUM. So, I have come to these conclusions, as of my 70th. year here, and 55 years playing bass. Some are unpleasant to hear, but this is the reality of this petty and cold business. Making music will never change. The business has. Life has taught me that the only thing I can control, is my own belief system, and behavior. We have no real power other than that. The fact is, that's a lot of power.
No one really gives a damn about your 'sound,' or your 'tone.' You just need to be a body onstage, that plays the changes and looks the part. They don't care if you bring a Hartke combo, an SVT, or a high dollar Glockenklang or Mesa Subway rig- if the singer doesn't like your hair, or your face- or who you vote for, you'll be told to turn it down, or you'll be replaced with a woman with big boobs, who took up the bass three years ago. Don't think so? I KNOW this to be true.
Your chances nowadays of actually earning a living playing bass- are even less than in my day, and it wasn't exactly a lucrative career then.
So, is this 'bitter?" Nope it's just true. I'm not resentful, I'm grateful. I still love playing bass. I am waiting for my newest bass to arrive- a Sire V7 lefty. I have one, and dig it so much, I ordered another. I have one weekend gig this month. Not enough. But one gig is better than none. I practice frequently. Always trying new strings, pickups, preamps... and am as into it as I was more than a half-Century ago. I just really don't care about the music business anymore. Never forget this:
Music Business, is an oxymoron.