Thank you for your comment. Our team size is 3 people, but I’ve been the only one who actively worked on converting the application. In total this covers around 250 components, with varying degrees of complexity. Note, I didn’t work on this full time for the first two months or so. In the beginning it was a thing that I worked on after all other tasks were completed.
During the process our application got noticeably slower, because you have to load two frameworks instead of just the one, so I’ve been working on performance optimizations right from the start, to keep the boot time sort of manageable.
Right now, I’ve completed around 98% of the migration, all pages have been converted, so the full speed of Angular is showing. Compared to before, it’s (on a development machine) gone from a boot time of 6–9 seconds to about 750ms.
I have about 4 years of experience working with AngularJS and almost 2 working with Angular.
Hopefully this helps to convince your team to take on this project. It’s very much worth the time and effort if you ask me.