Having to support one type of device allows for a lot more optimisation than supporting thousands
Elliptical orbits are perfect for polar regions, both Leo and geo are inevitability going to suffer more than a well covered elliptical
If you run mostly Foss this isn't even a problem, there's almost always an arm build (prism launcher even has arm on windows support)
With a big dev like valve backing it they could probably implement a pretty impressive JIT/cacheing scheme - of course nothing beats native but this gap will close over time
@tiddy
@sh.itjust.works