Good point, but if it ended at 3, we wouldn't have gotten so many characters and lore. I think it should have ended at FNaF 6 and had Ultimate Custom Night as a "post-credits scene" type thing. Then if the new games are released as a totally separate story and lore but with the same core animatronics, Freddy, Foxy, Bonnie and Chica, that would be better. But I'm fine with either FNaF 3 or FNaF 6 being the end.
Whoops, sorry if I kinda went on a rant about this, it's just that I'm really passionate about the series. I don't expect anyone to read this though 😂.