I wouldn't say that, seeing as the project seemingly recommends using its own Linux kernel module, so only specialized projects may pull this out-of-tree module and compile it into their kernels. On a standard router, maybe even if you flash it with specialized ROMs like OpenWrt, you may find Wireguard, but not AmneziaWG. It also seems to need its own forks of standard Wireguard tools which you probably won't find in some distribution families. Maybe Debian at some point, later Ubuntu, and maybe maybe Fedora. On Arch, it might surface on the AUR (or probably is), and on SuSE on the OBS. Red Hat will never adopt it, and if Enterprise is not really interested, you get into a situation where single developers, or a single group of devs, are maintaining something used commercially again. It is not sustainable; you'll never know if it'll still be there in 5 years, or if internal disputes won't force the project to be forked and developed under a different name. But standard Wireguard is developed by well-known researchers, right in the kernel, and garnered enough commercial interest that some consumer networking companies implemented it as a feature. Wireguard is sustainable. AmneziaWG is not. It will never replace standard Wireguard.
Besides, the aim of Wireguard is not privacy. And most people around the forums (by topics created in the forums, at least) use the VPN not for the privacy aspect but because they want to torrent. What they're looking for is performance. You don't need AmneziaWG for that.
What I'm concerned about is the relationship Wireguard <> AmneziaWG. AmneziaWG would have the obligation to behave in a way a standard Wireguard behaves if server and client differ. I don't know how Wireguard will react if those fixed parameters talked about in the docs are altered. Maybe it's not even a problem, since AmneziaWG clients can connect here normally. At least according to some threads it doesn't seem to be a problem. Dunno.
But, no, a replacement is highly unlikely, both generally and specifically on AirVPN.