And a lot of these questions trade off competition, and the user benefits that result from that, with simplicity and ease-of-use, which are also user benefits (that network stack again).
Lastly, I realize that not every company is a technology company. Centralization is necessary for some hardline and service industries, and that won’t change because of better remote work tooling. However, the technology industry is subsuming many legacy industries (e.g. big box retail, movie theaters, financial services).