@crmsnbleyd Is that the case? Mastodon keeps copies of remote media and I'm sure, texts too. Pleroma (or Rebased/Soapbox) does store media from remote servers (was also the reason I chose it) - though I'm not sure about text posts.
Take for e.g. this Fedibird account I used to follow - used to post a lot of pictures/photographs and texts too (sometimes). After the account was deleted, you can't view them anymore: https://charcha.cc/@ami@nightly.fedibird.com