I felt like Angular 2 was the Angular team repudiating all the mistakes they made with the original AngularJS.

They don't even seem comparable. I too want to barf each morning when I work on the ancient JavaScript AngularJS app, and then moving in the afternoon to the more modern Angular 4 project, written in TypeScript, feels like stepping out of my time machine back into the modern era, with a spring in my step and a cool breeze wafting through my beard.

I would have no objections to joining a modern Angular project, whereas I would absolutely, positively never join an AngularJS project again (unless the fate of the human race depended on it, or something like that).