If you have games you’ve written in Godot 3 (or are currently building), Godot 4 alpha 2 is out, so it might be time to explore what it takes to port those works to Godot 4.
I’ve created an in depth guide to porting one of the official Godot 3 demo games; Dodge the creeps.
After watching this video, you’ll have a good sense as to the effort involved, plus a summarized guide to utilize in porting your own games.