Nice but AFAICT one can self-host lichess https://github.com/lichess-org/lila so I'd imagine based on how active it is, how inclusive it is (including languages like Chinese) I would provide some comparison with it. In terms of long term maintenance I have a hard time, and sorry to be so negative, to imagine it will last longer solely based on the size of the existing community.
PS: even has container images, e.g. https://github.com/lichess-org/lila-docker so before I could finish writing this message I had my own instance running.