[jarcane]

Not to mention that going with a third-party host is still relying on someone else's computer being trusted with your data. It's like saying we don't need physical drives anymore because Dropbox and Google Drive exist. And yet that's basically the environment we've constructed for the web.

Beyond the barrier of technical knowledge, there's also a barrier of access: many people simply do not have internet access that allows true static hosting. Even setting aside the historical issue of IPv4 address limitations, there's things like ISP port blocking, packet filtering and snooping, rate-limiting of upload, etc., that exist specifically to prop up rent-seeking hosting companies and "business plans" that charge ten times the money for the same exact advertised service just with the blocks turned off.

My theoretical app basically can't exist anymore without a lot of awkward hacks. Windows actually still has web hosting features built-in, but I can't use them outside the local network because my ISP blocks the port for HTTP (as well as a ton of other protocols), and dynamic IP means I can't link it to a domain anyway without third-party tools like DynDNS. Instead I'd have to rely on tunneling services like localhost.run, or peer-to-peer protocols that piggy-back in clever ways on existing open ports, or else pony up for a business account and pay more money for, often, less bandwidth than I have now.