Centralized has subscriptions, advertising, and "surveillance capitalism." Decentralized has nothing. I had some hope that cryptocurrency would provide some kind of mechanism, but cryptocurrency was taken over and destroyed by scammers and bad money drives out good.
The lack of an economic model is IMHO why decentralized solutions have not succeeded, not technical challenges.
One possibility would be to abandon the free as in beer part of open source ideology and go back to just charging for software, but licensing and payment add friction and it's very hard to compete with "free" options funded surreptitiously via surveillance.
BTW the fact that cryptocurrency was destroyed by scammers and criminals highlights a second huge issue: it seems to take the efficiency, executive ability, coordination, and direct human guidance of a centralized system to resist bad actors. This is why even the most democratic countries have mechanisms to phase shift into dictatorships during emergency or war. I have yet to see a decentralized system that became popular and was not instantly destroyed by black hats.
