How many (large) companies, governments, etc... run their own email servers? If there's a strong enough need, people will run their own servers even if they'd rather not. "people don't want to run servers" arguably could be rephrased as "people don't have a reason (today) to run their own servers". I'd argue this is a key difference between web1 and cryto centralization and the web2 centralization. If Google announced tomorrow that anyone can buy the gmail contents of any gmail address, you'd bet a lot more individuals would either switch to alternatives or start running their own severs.
> How many (large) companies, governments, etc... run their own email servers?
Office 365 financials alone suggest that the answer is "very few, and rapidly decreasing". I work for a ~30k employee technology company that doesn't run it's own email servers.
