From the sysadmin perspective, it's a dream app to deploy: just unpack (or git clone) the latest release in a directory, point Apache (or Nginx) at it, and continue in the guided setup process (which involves creating a database, typically MySQL).

Updates are also painless: there's a php maintenance script which updates the schema. I've kept MW instances for ~10 years without running into any problems.

Things get a little more interesting if your add a ton of extensions, or badly maintained ones.

I wish I could say the same of Django and Rails apps! <trollface>