Lol. But in seriousness finding time and motivation to play everything I've downloaded would be wonderful. Unfortunately time is limited. I still seek to preserve what I can. My favorite mario fan game has always been and always will be Mari0, a Mario + Portal crossover which has remained free to access for 10+ years at https://stabyourself.net/mari0/. It could be because of nostalgia though. Super Mario... Source: over 1 year ago

I would recommend Render96 instead. I like the dev of Plus a lot tho, so I'll tell you about this little beaut right here, which he has been working on for quite a long time. Render96 obviously is a major graphical overhaul, while adding in Luigi and Wario from the DS version, and even restoring some cut enemies. It's also the version with the ray tracing build. Plus has some great enhancements and a solid UI, but... Source: about 2 years ago

Looks like this but isn’t https://flashback.mors-games.com/. Source: over 2 years ago

I've been a fan of a 2D Mario platform fangame called Mushroom Kingdom Fusion (MKF) for many years now. It's gone in and out of development, but right now has a very dedicated modding team. Source: 12 months ago

Yep, hell, the latest unstable build (released in the dev team’s discord) came out about a month ago. Source: over 1 year ago

The latest release can be found on itch.io, and was last updated only 43 days ago. I'll definitely be giving this a go coming up. Source: over 2 years ago