[bawolff]

The edit view that most power users use is definitely not an spa.

There are multiple "editors" in use on wikipedia et al. Visual editor and mobile edior are more SPA-ish, however the old fashioned <textarea> full of code, editor is still very popular among users.

Disclaimer: work for wikimedia, but not on stuff related to this. My opinions are my own.

[mch82]

Another interesting note is that Parsoid, the nodejs service that turns wikitext into the Visual Editor, is being ported from js to PHP.

[folmar]

The texarea is also currently the default, at least on English edition.