i agreed, this is partially true…
(though most of Live 10s improvement to Push, are for the P2s display… so obviously those features are not making on to the P1)
but in both these cases most of the software resides on the computer (so lots more resources to play with) and also means (at least in case of Push/Live) this development is being funded by software upgrade costs (e.g. Live 10 upgrade), rather than the units cost (which they already have pocketed )
and lets not forget we are talking about much bigger development teams, so more resources for different products.
of course this is all opinion, different users, different needs e.g. some seem to dislike the X/Y pad, but I actually would hate for it to go, some need more from sequencer, some need more from the looper … all different priorities.
easy to forget we also have very few voices here (20-40 active?) compared to the number of units sold (mines close to #800), perhaps the voices here are representative at times, but perhaps at times they are not.
(there is a natural bias on product forums - towards users looking for solutions, its the nature of the beast)