Except for the fact that Wayland has had a fractional scaling protocol for some time now. Qt implements it. There's some unknown reason that GTK won't pick it up. But anyway, it's definitely there. There's even a beta-level implementation in Firefox, etc.
How many apps will you display if you don't display them right? Are you ready to tell me poor graphics is not one of the reasons people not use Linux? You won't display apps to the users you lost. Instead Windows will.
That is right, but if the whole point of Wayland is to fix what X can't, then why not do it right from the start? Things would break anyways. Otherwise it's not really fixing all glaring issues X has.