Today I restored this blog from an old backup. The entire process took about an hour with an additional hour of trying to clean up old datasets and get rid of some encoding errors that the blog has had since I last migrated things around in the early 2010s.
This demonstrates not only the usefulness of backups (do your backups!) but also illustrates the point I wanted to make for a while.
The data on my server is mine. I own it. If I feel like it, I can replace every occurance of the word “blog” with “benis”. There is no moderation team that will judge my now-benised posts to be inappropriate, racist or immoral and delete them.
I can take every last bit of my data to modify and/or move it. Something your preferred platform might not allow you to do.