Optimus

[Ninja ZX-10RR]

I think the only person who knows for sure is Bugo, so I'd rather wait for him to say something. He's generally very friendly and helpful
For the time being, however, I cannot find any reference to 2.1 so unless he specifically says otherwise it's not officially supported as I pointed out

[smartmouse]

Actually, Ninja -- Optimus *DOES* have a version that supports SMF 2.1

Where can I get this version?

You might need to get the 2.1 version from the author's github

https://github.com/dragomano/Optimus

No way: "Wait for the 2.1 Final. Unfortunately, at the current moment, I have no time, no funds, nor desire to continue this development"

https://github.com/dragomano/Optimus/issues/36#issuecomment-881225330

if you are running SMF 2.1 RC2 -- you DESPERATELY need to update to RC4.   there have been literally THOUSANDS of commits since RC2

Done, thank you

[Ninja ZX-10RR]

Poor guy got 44 pages thread, it's understandable