I did a gig Saturday afternoon, playing for a church anniversary at Camelot in PG County.. I took two 20+ year old Foderas, a five and a six. Had a pretty good time, only played one set so I only used the five.
Did the audience care or notice my basses? Beats me... I didn't poll them. I also didn't bring them for them, I brought them for me.
So the whole "need" thing is a foreign concept to me. If I were to apply "need" to something I love to do, why wouldn't I apply the same yardstick to the more mundane? I could rotate two pairs of shoes. I could always dress in black. I could wash the pair of socks I wore yesterday while I rotate the other pair. I don't need to eat food I like, I could do it strictly for maintenance. I could just drive an AWD pickup, I certainly don't need three older sportscars (my newest car is a 2003).
If my life were really about need it would be far less enjoyable. So I keep that in mind when I do things I want to do.
I recently sold three basses because I had several non-music projects I needed to pay for and I didn't want to borrow. All three sold at healthy profits from what I had originally invested. Because that's how I bought them, with the knowledge that one day I might let them go. In the meantime I did a bunch of gigs and the instruments pretty much paid for themselves. I tried that with a 401k, the audience didn't care for it. Maybe they weren't drunk enough.
So no, I never think that I have too much gear, they've been investments that I can and have played. MMV