@alterelefant @bert_hubert @ayo Yeah and no.
Operating systems, file formats, protocols, … do change, and dependencies can help on this part, so you'd have to be careful to not minimise too much.
And picking a dependency should mean keeping an eye on it, hence the question of possibly ending up maintaining said dependency.

And future proof… I think the best way to approach the future proof ideal is to allow independent implementations to be made.
You can have code which should work well in the future but realistically there's no telling what will happen in roughly 10 years. Which to me is a rather short timespan for software, but enough for big changes to happen.