I... don't think that AngularJS + third-party scripts was what OP meant by plain Javascript.
The lack of pre-processing steps, combined with good CSS and a well-formed DOM made it one of the rare project in my work history that didn't create any rewrite-envy.
AngularJS or not, the main point is that avoiding piling layers of tooling that might force you to an upgrade for purely technical reasons was a nice experience.