The underlying purpose of org-mode is to manage this issue (the text part). It doesn't solve it, instead it is a tool for managing the steadily increasing archive organizational complexity within an ever evolving timeline. You reconfigure your archive's implicit schema well now you're in a world of heavy editing. That's life. If you don't have a solid backup strategy, you are going to lose stuff. That's also life. Big binary blobs are a different, equally important problem.
Sure, keep your archive text in markdown (which one? a dumb person asks). But I'd recommend managing it with org-mode, it doesn't really care what format your text is in.
(Yeah I saw the footnote mentioning org-mode but that reads to me that org-mode's reference there is entirely about the markup flavor.)
Yeah, org-mode and by extension Emacs really help in this regard. Now that Emacs has been ported to Android I expect its usefulness to only increase.
Looking back I can't believe I considered just bookmarking a link enough to save it long-term. Sure, I lost a lot of cruft but there were some gems that in retrospect I'd have liked to still reference or look at today. Eh, hindsight is 20/20 as the saying goes.
Sure, keep your archive text in markdown (which one? a dumb person asks). But I'd recommend managing it with org-mode, it doesn't really care what format your text is in.
(Yeah I saw the footnote mentioning org-mode but that reads to me that org-mode's reference there is entirely about the markup flavor.)