Been using Logseq for six months, and yes. It’s all just .md and media files referenced by relative links.

This was an important factor the choice to use it. Having used several note taking applications / systems, getting your data ‘out’ in a painless fashion is the #1 concern.

Don’t necessarily think of the solution as opening them.

The solution could hypothetically be that the stalks (that contain the battery) are modular and replaceable. They could snap to the bud part with some kind of ‘mini-magsafe’ connector.