Minimum viable product.

In this case, "hey we need a way for people to talk to each other", "sure, we should make a discussion tool, but to get it right now we could use a wiki page that users edit one after another to add their answers".

The fact that it started as such is not an issue per se, but after so many years wikipedia should have replaced it with something better and easier.

Maybe MVP is being used as a calling card for the concept of iterating on a prototype in general?

Lean startup methodology was an inheritor of common wisdom such as "worse is better" and "best is the enemy of the good" but they're all in the same family tree.