5e for me, no contest. Easier to pick up and run, easier to convert older material, etc. I've been able to improv entire sessions in the 5e system, that's an ease of use that I can't say I find many other places.
I liked PF1 and appreciate PF2 for what it is, neither were/are bad games. I just don't get that same "pick up and go" feel from them. My personal experience running games has been such that the less I have to think about the system, the more I can focus on the actual playing of the game.
And when it comes to frequency and quality of new material in 5e I'm of two minds. Part of me is always eager to see more, almost like a holdover from older editions where you could literally bury yourself in books. I think, however, that when I take a step back and really look at it... I realize as a player or a DM that the core three for 5e will allow me to create characters and stories for decades. So new stuff is nice and exciting, but it's just gravy to me at this point.
Anyway, they both have their place, but I'm a 5e person.