You can look at the Phoronix benchmarks results from earlier this month. While they are certainly usable, the performance is still quite a bit lower than mid range AMD and Nvidia cards in most games.

Apparently they're a really good choice for video encoding (e.g. if you've got a Jellyfin server or are a streamer or something) because of AV1 codec support. (I think that's the important one, anyway.)

I agree with cmnybo. If you like the long term prospects for the Intel discrete GPUs, grab one. But currently, drivers are still early in their development, so be ready to experience some growing pains.

Ill say promising. Mesa recently landed sparse support so that should make a lot more games playable now, perf is decent but there are for sure still bugs, for instance for me and a couple others, gamescope doesn't work right

Performance is pretty good with my Arc A770 on Arch Linux. It's had some growing pains but they're pretty much all resolved now.

With my 770, I mostly do desktop use and I play some Northgard, which works perfectly fine (1440p ultra settings)

friend has one, he's happy with it. It has mesa drivers so it should work great

Performance is worse than alternatives, and there are some features that work on Windows but they have said they won't support them on Linux. So, AMD is still unrivaled on Linux.