Trilium is good

Digital data is extremely short lived. Unless it’s being maintained well and copied, it will decay regardless of storage medium fairly rapidly. And as you point out data interface techniques are themselves quite short lived. Storing data as something accessible without specialist technology, so plainly readable, instructions on how to build the reader and decode the data, etc.

Future technology may improve this by having historians interested in historical records wanting ways to recover it, at least.

That’s essentially the opposite path Photoshop took and that’s considered good for both. Anyway can attest, krita works great for everything I’ve every used Photoshop for.