The hard part of forever isn't picking the right technology, it's keeping the content available online.
You can't self-host this. So unless your bank account is designed to pay for the URL, hosting, and keeping the project up to date forever, you're just lying to lock people into your platform.
Besides being exceedingly, aggressively negative and paranoid, this also doesn’t make sense at all. Why would they build this niche thing, make it explicitly privacy-focused, and target it to an audience who surely will notice any abuse?
The hard part of forever isn't picking the right technology, it's keeping the content available online.
You can't self-host this. So unless your bank account is designed to pay for the URL, hosting, and keeping the project up to date forever, you're just lying to lock people into your platform.