here's from a long time user from Italy.
I work in IT and have been using DokuWiki for work and personal use since at least 2009, probably before, I lost track.
It's one of my most beloved pieces of software, it has never let me down. As many others here, I appreciate the benefits of the flat file storage, I'm sure it is the main reason for the longevity of my experience, but also the simplicity and of course the quality of the code.
I'm very grateful for it to Andi and all the community.