Reminds me of a blog post a while back saying that gigabit fiber at home would lead to everyone running their own email server.
What a weird take. I was running my own email server 25 years ago on a 512 kbit ADSL line. No problem at all, would even be enough bandwidth today for most messages.
(Back then email still worked from residential IP addresses, and wasn't blocked by default)
There was no chance that everyone would be running their own email server, but if it wasn't for the lack of IPv6 adaptation a plug and go home email server solution would probably see a decent amount of use. I'd bet we'd already be seeing it as a feature in most mid-ranged home routers by now.