For a time I too was the maintainer for GNU sed. Part of that time I was paid by the FSF for that work (this was a long time ago, when the FSF had a small staff working directly on the Hurd and GNU). When I started, GNU sed was very incompatible with the relatively new Posix standard for sed. When I finished, it was less incompatible. It was during this same time that I started work on a new regexp engine for sed but…
Debian is a 100% free distribution, with a strong culture and high technical organization. It was the GNU distribution in the 90's until they parted ways.
Are there not dozens if not hundreds of distributions of free software based on Linux and the GNU core? Compared to the early days of Linux (and GNU as well), I'd say Free Software as a whole is doing pretty good. The very existence of those distributions and the amount of software based upon them is your sustainable culture and technical organization. Canonical and Red Hat could go away tomorrow and they'd still be there.