[regularfry]

This tends not to be why luxury models are unreliable in practice.

Luxury models are used by the manufacturer as a proving ground for the tech they're going to filter down to the mass market models next. Luxury model customers are relatively price-insensitive but want to be able to show off shiny features, so they get the exclusive new tech that's not been tried at scale yet. Thus the unreliability. It's not the technical constraints, it's the maturity of the technology.