Of all of the reverse engineering related Linux efforts (and most corporate Linux efforts), Asahi have been the most methodical and relentless about upstreaming changes into the kernel and all of their upstream intermediaries (freedesktop/Mesa etc.), specifically so it's maintained, even at the detriment of the project velocity and contributor health.
Asahi is explicitly not supposed to be a fork + dedicated distribution long term and over time, the delta between Fedora Asahi Remix and Fedora has grown smaller and smaller.
> Asahi is still the only Linux on Silicon option
What do you mean? There are non-Fedora Remix distributions which incorporate the "edge" Asahi changes, like https://ubuntuasahi.org . And again, as more and more gets mainlined, it becomes increasingly plausible that many distributions will be able to support Apple Silicon "out of the box" without much special consideration.