I played 5 stringers exclusively for many years (been playing 30 years in total) and 6 for several years too. At the time I could not imagine ever going back to 4.
However, in the last few years I have increasingly gone back to 4, to a point where I now only own 1 5 string that I use when I need it (depping mainly), but day-tp-day I mainly use 4 string basses with a Drop D tuner. And I also have a BEAD tuned 4 string that sounds killer.
Ultimately it doesn't really matter what you play, it is what you do with it.