Docker has kida solved the "run application" issue. The real stuff most people care about is the data those applications manage.

If you don't realize what this means (and I won't fault you for it) just imagine what would happen if the $300 hardware and storage were burned down in a house fire or stolen by a burglar.

I self host and have offsite backups on rsync.net and a sneakernet network of people where we exchange a few TBs of encrypted storage with one another to hedge this risk but even then there are scenarios where we could lose valuable data.