Absolutely, it's 100% playable, has been for years.

I tried it recently and while some aspects are great, it's definitely not ready for prime time. Most of the UI is confusing and cumbersome, and it's just riddled with bugs. I think I may have tried it just after a major content patch, where previously there had been a long period of stability. But still, it was a bit of a mess.

You can see the fun just starting to poke it's head out, but it's hard to find at the moment, you have to squint.