I have been maintaining a number of wiki installations based on MW and extensions
(including SMW) for more than a decade.
I must admit, I find it increasingly hard to update these installations. The old zips have
mostly disappeared, and the once promising Composer is not straightforward to use, nor is
GitHub. Composer is even disallowed by some internet providers, for some reason.
I would have liked to see a management frontend where you select your choice of
extensions, and get the corresponding code and possibly database updated, not having to
know technical details, such as the structure of JSON files or other. As the situation is
now, I suspect many wiki installations use rather old code versions, which is really a