Ahh the P bass - if it ain't broke don't fix it!
Like many I've owned a few usually Fender or Lakland. Mike Dirnt, MIM, USA '08, a '79 (which was bought by a guitar store back home who were commissioned to mock it up and use it for the Phil Lynott statue in Dublin - a true honour!)
I now have a '89 Jap P which is a delight to play. I think coming back to if from a 5 string jazz made the neck feel 'small' but totally right at the same time - just feels super fast and effortless to play. I have put a Bart pick up in it and it sounds great in the mix - no fuss, no hassle just plug in turn up the volume and play.