I wouldn't say that open-source SaaS is the "least open" way of using software. If you're using a hosted service based on open source software, you know that y

I wouldn't say that open-source SaaS is the "least open" way of using software. If you're using a hosted service based on open source software, you know that you can leave. You can grab your data and self-host. You can move it to another host that has reused or forked the code. You can run it locally. You have options. If you're using local closed-source software, your files might not even be usable without an Internet connection. Think Spotify (closed source, local) where even your "offline" playlists won't load if you don't allow the software to phone home once in a while.