Think it's a bit early to tell for sure, many predictions overplay the short term and underplay the long term or sometimes vice versa. Some of that bloat that's no longer there may have been what made Twitter stable without those employees now. What I think Twitter has lost is slack, for better or worse. Twitter may just be stuck in its current form for the most part for the remainder of its live (not that pre-Elon Musk Twitter was gearing up for a pivot or anything). If they do find a new lucrative pet project to put resources into or significant regulations to deal with on a technical level, maybe it will just be less over-engineered, or maybe it will be covered in band-aids.