Early 90's for sure.. I wanna say around '93 or so it was over for me.. The sound changed too much or just didn't sound that good to me anymore..
Same with the Club Dance music.. there aren't nearly as many favorite records of mine I like after '93.. as the sound was changing into something different that I never cared for. There are some exceptions but not much

I think '97 was the nail in the coffin as I didn't hear any oldschool House/Club sound anymore.