My only complaint is how it's pronounced. Can't help but think of leeches.
Too much fantasy here and “lichess” makes me think of a female lich.
Well financed commercial players like chess.com, chess24, chessbase were never able to replicate it. Lichess which was a one man show for a long time has beaten them all in engineering department and not by a small margin. The difference is just night and day, like driving 30 years old car and modern one.
It's one of the examples of how you can't pay your way to good software. There was a discussion about Discord lately and how it's about userbase only and how you could recreate it spending a fraction of what its valuation is. I don't think you could. I mean apparently you can't even pay your way to get somewhat playable chess site.
Btw, check the git log (or run one if those punch card scripts on the repo). The main programmer is a machine. It's humbling what kind of output a great programmer with great work ethics can achieve.
chess24's default chess board is easier on the eyes than the flat design lichess one.
lichess is amazing for playing though.