I know musicians who have played for 20 plus years, constantly gigging, but can't get their act together, turning up late, broken gear, no spare anything.
Experience doesn't mean they're gonna be good, but most people learn SOMETHING after all those years.
I've been lucky enough to have always played in bands with people I was friends with already, bringing in one new person maybe.
It's more important that the new member gels with the band than whether they've played in bands for a long time, assuming the talent is there.