Most of my 34 in basses have TI flats except for a Ray I keep fresh round Slinkies on , and an old Pbass with ancient rounds. Most short scales have LaBella flats , my Longhorn still has the factory rounds. It was also gigged a lot. They still intonate , and it thumps. I have some short scale Gibson rounds if I wish to change anything. They came on my DC LP Jr and I really liked them , bought several packs , the Jr has LaBellas at the moment , might return the rounds on that.
I find I can leave flats on for years before I have any urge to change them. I’m mostly aiming for a classic old school thump. They deliver that.