I'm not that concerned about Quiver not being open source, as its note storage format is simple & documented json. Should there be a reason to move away from Quiver, it would be pretty simple to construct a way of transferring notes (assuming the destination is as transparent). In the meantime, it's quite a pleasure to use: very fast, well-presented, and with carefully-considered interactions.

I must give Boostnote a try. On the face of it, I would think an engineering notebook, to be used daily for large amounts of stuff, would be a paradigmatic case for a native app like Quiver rather than electron. But then there's Atom & vscode so maybe not? And I'm a bit uncomfortable with Boostnote's copyright transfer for pull requests (https://github.com/BoostIO/Boostnote/blob/master/contributin...). But then again, I pay little attention to copyright matters so perhaps just haven't noticed if this is common in open source. And it's clearly nevertheless more open than Quiver.