Yes. ^. if you have the dough to spend.
I own a few high end basses, Elrick, Jerzy Drozd, Minnieweather, Ken Smith, Tobias, but I will have to say that as much as I play them I also play my Hot Rod Shell Pink Fender Precision w /a "real "62" Fender P-body with a Jazz neck and Audere 4 band EQ" also a Fender Roadworn P Bass, and a MIJ Precision Lyte w/Fodera Preamp just as much as the highenders.
In or around 1989 I went to Doug Rummian in SF for a custom "Jazz" build, it was cheap back then about $1200 haha. While he was building that bass a fellow he built a custom Frettless PJ with EMGs a Jazz neck w/ Ebony board and a solid Koa body defaulted and bailed on the build. I used to play that bass every time I went to check on my build. Guess what ....fell in love with the Frettless the fretboard radius was like a Cello (really like a Cello). So I bought BOTH! I still have that bass and would still have the "Jazz" too if it hadn't been stolen! They were just perfect for "ME"
I know I really got pretty lucky for the first time with a custom build. But in my defense I had been playing over 20 years then and had a very good idea exactly what I wanted. Plus it wasn't as expensive as it is now. I like what someone said about seeking out an up and coming Luthier.
As to GAS I still have it and will probably never lose the curiosity to try and own other basses. I played a RobAllen and loved it and want one as it doesn't compete directly with my Rummian Frettless I played an F-Bass and found the neck way too wide for my comfort and I thought I would love it!
I was a judge on the very first Bass Player Magazine 5-String Bass shootout and voted for the Roscoe fiver which did not win. I loved that bass! I still want to get both a 5 string fretted and fretless from Elrick cause I have discovered his basses are near perfect for ME!
It's not so much the grass is always greener as it is who wants to eat a PB and J sandwich for lunch every day for the rest of their life? OK someone will but you get the idea.
Go out and play every bass you can get your hands on and you start to find out what you REALLY want. Take the time and if necessary the money to go to a high end bass store and play everything. You may find something off the rack you love. You may figure out what it is you are really looking for. Without a solid knowledge base you won't be qualified to even spec a truly custom one off bass. Ymmv etc.