Ironically, I think Ubisoft has a good example of a multiplayer game with a good end-of-life despite not reaching its sales expectations with BattleCore Arena, where the last update allowed P2P play after the servers went down. Meaning that the game wasn't totally killed off, even if it was thought as yet another service game, which is always appreciated.

That said, given the lack of marketing that was done around the game, it was perhaps a "not too expensive game that could maybe work on a fluke", where Ubisoft's lack of attention potentially left the devs quite free with their game. Devs who thankfully respected their players and made good end-of-life decisions.