Road tubular is more dead than rim brakes! They’re super cool wheels, no doubt, but unless they’re nearly free, there’s so many better more modern options. “Aero” back then meant a narrow, straight wall that was absolutely brutal in any crosswind.
Most people I knew with tubs only race on them. You can’t exactly swap it out on the side of the road when you get a flat. They’re only really used in cyclocross these days, and even there, tubeless options are close to making them a hard sell. I’m down to one set and have no plans for more wheels if/when I kill these