They mostly work now and they are decent options at the low-end (what used to be the mid-range: $200) where there is shockingly little competition nowadays.

However, they underperform greatly compared to competitors' cards with similar die areas and memory bus widths. For example the Arc A770 is 406mm^2 on TSMC N6 and a 256-bit bus and performs similarly to the RX 6650XT which is 237mm^2 on TSMC N7 with a 128-bit bus. They're probably losing a lot of money on these cards.

It's getting better and drivers are improving all the time. I personally liked the Arc for the hardware AV1 encoding. Quicksync (I use qsvencc) is actually pretty decent for a hardware encoder. It won't ever beat software encoding, but the speed is hard to ignore. I don't have any experience using it for streaming, but it seems pretty popular there too. Nvidia has nvenc, and reviews say it's good as well but I've never used it.

When it works, perhaps