Wikis instead of Help?

Zoho has decided to use its own wiki to provide online Help instead of Help created in RoboHelp. They have posted on their blog the reasons why they have done this, together with the benefits resulting from this change.

This is what the help looks like now.

We're not anti wikis and we're not pro RoboHelp, but nearly all the benefits seem to relate to how the Help was produced and not to what was delivered.
For example:
With a move to a wiki, the users seem to have lost a table of contents that follows where you are in the document.
The individual pages are very very long, unlike the short screen size pages normally you get with RoboHelp generated Help.
There's no pop-up Help topics (for things like glossary descriptions).

These problems may be down to bad information design rather than technical limitations, but it seems fair to say that this change has brought disadvantages as well as advantages with it.