There's a lot of retro dev happening now across the board. SGDK has led to a big interest in making Genesis/Megadrive games. Jo Engine is increasing interest in the Saturn, etc. I'm also attempting to help contribute by writing a book on Neo Geo development (it has a long ways to go)
I just would absolutely love to give a +1 for jo-engine. It’s an insanely strong dev kit for Saturn games with great built in features like tilemap support, basic collision detection; a sprite converter - and a handful of incredible tutorials.
I got started as a developer / programmer at about 10/11 with mostly Assembly due to the burgeoning Sonic ROM hacking community. I’m 32 now and I’ve been a professional developer for 12+ years. I owe this scene a lot!
https://github.com/Stephane-D/SGDK
https://www.jo-engine.org/
a Saturn homebrew showcase - https://www.youtube.com/watch?v=NqKKExcTaKo
https://neogeobook.mattgreer.dev