First thank you for a great work!

From my point of view it worth to mention that Angular is going to CLI. It’s ok for the most cases except if you do need some fine control and your own build conveyor… for this situation you have a bad news. A lot of efforts needed to keep e.g. webpack builder config actual, especially with AOT and source preprocessing. I’d say, black magic, sacrifices and obscene lexic, and the result will be fragile and unstable; and you’ll be thinking asking React for shelter each five minutes.

But if CLI is OK for you everything will be (almost) smooth and seamless.