I do want to stress though that in that case, Hugo's speed wasn't a positive enough tradeoff vs worse templating to switch.

We used both on a case by case basis there. A few dozen online properties. Hugo got used on the simplest stuff, often 4-5 page lead generation sites which is about 30% of what that company did. Speed of builds/deployment is basically the same there, but with Hugo the tooling/pipeline was much simpler.