Ive migrated several apps to angular 2 and assuming you got to angular 1.6 (or even just 1.4 with components) first, the rewrite is no big deal unless you heavi

Ive migrated several apps to angular 2 and assuming you got to angular 1.6 (or even just 1.4 with components) first, the rewrite is no big deal unless you heavily leverage specific things (root scope, some directive stuff, some template cache stuff). Especially with ngUpgrade available, I never found it terribly hard, though it did take time.