So Nintendo just announced their final Mario Maker 2 update for Switch. It now officially adds support to effectively build your own Mario fan game. You can build "games" of up to 8 worlds and 40 courses to share online.
The full trailer can be seen here.
Personally I'm excited to see what sort of worlds can be created by people like Matt Thorson (Celeste Developer who has previously uploaded Mario Maker courses) and other talented individuals throughout lockdown.
Makes an already great title for switch now truly essential for any Switch owners or platformer fans imo.
If they had this feature from the start I definitely would not have sold the game. Don't get me wrong, still had fun, but I wasn't super into making my own worlds and stuff and wish I could just download a coherent set of levels and play through. Glad to see them deliver what the people wanted in the end.