It's been almost 10 years since I've used anything Playstation related and need help getting back up to date. My PSP is a 1001 with firmware 3.60 m33 and my questions are;

Is m33 still the go to firmware to update on or is there a new/better alternative?

What are some good interesting games (apps,homebrew etc) to check out again?

What has changed since I left the scene back in ~2007?