I would be scared if I ran Peloton. Their entire MO is the ecosystem; you buy the bike, with the integrated tablet, and use their fitness program. Outside of the top 1% who could drop three grand on the Peloton system without blinking, Apple's whole "$500 dirt cheap bike + $300 brand new iPad (that you may already have) + $30/month Apple One Premier" system (that you may already subscribe to) is killer.
Yeah, you can BYOB to Peloton, but Fitness+ (especially as a part of Apple One now) is dirt cheap. At that point, Peloton (and competing products) basically just has to hope that the workout quality in Fitness+ sucks, which isn't likely (this is Apple we're talking about, they rarely half-ass things).