Thanks. I think the concern about software provider shutting down is valid. Heck, I still remember being pissed when Google deprecated two products I used within a month (a few months back).

Self-hosting might be too complex to setup, but do you think single tenant offering helps? I don't know if it makes sense for individuals tho.

In addition to HTML & CSV, there is an option to export JSON, which supports more formats. In a way, it is an open format (.json) but I'll have to add relevant documentation. PDF support will also come at one point.