You are 100% right. Server was pegged at 100 and the family (me) were complaining about email not working (who runs their own mail server any more). We needed to shed load. Some things went to GitHub pages (https://github.com/WardCunningham/remodeling) and the rest turned into simple content loaded by that. There were some more complexities because of SSL and old OS but it works. Things have evolved since and will continue to evolve but expect the original wiki to remain accessible in some form.
If the wiki is not being updated anymore (or is it?) than why not just host the original one (not the current JS one) as a whole on github pages? Won't this save server costs?