I haven't really been able to test Polytoria, but I find that it looks like an old Roblox client from around 2007-2012, but with a modern look and beautiful shaders. However, it's still interesting because every 7 hours you earn Bricks (their equivalent of Robux/Tix for older players like me).

And it also seems that you can sell certain clothes for free, like in the good old days of Roblox when you could sell a shirt, pants, etc. for 0 Robux.

So, is it a good alternative to Roblox in my opinion?

Yes, but if you're an old-school player like me, because I haven't seen any Brainroot games in a gambling style for minors yet, and it seems that Polytoria is less extreme in its capitalist mode compared to Roblox.

As I said, I haven't been able to really test Polytoria because the servers are having difficulties at the moment due to a surge in popularity caused by controversial new decisions at Roblox, such as 2D faces becoming 3D.

and it even has the ability to make your game open source (Uncopylocked)

The disadvantages:

I'm less of a player because... it's logical.

The server is currently running as slow as a snail.

There's no mobile version (as far as I've seen).

And... THEY'VE MANAGED TO BYPASS UBLOCK ORIGIN!!!!!... sorry