What if yorniq.xyzis backend'ed by a Git as a repo per site? Any changes is staged as single branch.
Theoretically, it's possible. It's possible to retrieve old deleted or changed files chronologically or revert the site onto certain point. But it's gonna take more disk space and it means more cost.
Neocities is a free service. It's running by its users for its users. More importantly, it's ad-free. Your creativity and activity on the site count as support, so just deal with it! https://yorniq.xyz/about