Ads removal and "git/simple file structure" are mandatory features for me (PDF export is optional though).

But first and foremost, it should be an open-source tool, I forgot to mention it. I don't want to be stuck because (as already said) a company/website closes. Yes backups are possible, but when the tool is gone, it's gone, and backups are not really useful. People will have to spend days trying out to figure a new tool and how to import existing data. Open-source protect from such kind of issues.

I don't say this tool is bad, it is probably really nice for some people. But at least for me it does not fulfill my wills/needs.