It's fast because 2024 is an election year, and they expect you to register as Democrat and vote for grandpa Joe "The friend of immigrants" lol once you get your citizenship. Otherwise it would be a 6-month process (at least) from filing to tge ceremony of oath (this year, that time is slashed by half). I got my biometric appointment in 2019, 2 months after filing the N400. Lucky you!!!

@azma ramzani if you file online. your previous biometrics will be reused instantly. if you do paper filing, they will convert it to online filing and still reused your previous biometrics. N400 applications are always a little bit faster in election year irrespective of whoever is the president.