Hi, I have been using Dokuwiki for over 15 years, for personal, professional and nonprofit purposes. I don't recall how many installations there have been on various environments - or still running. Actively I participate in about eight dokuwiki sites for me, myself and my customers. Now I am transferring data from our company inner documentation (beginning from 2006) to a new Dokuwiki installation, to make it a bit up to date. I am a bit (ok, some more bits) over 50.