Too often they bring breaking changes. I hoped after stable release they will stop breaking things every two weeks or so, as it was in alpha, but looks like they still don't understand that every breaking change stops development of projects for 1-2 days and this time is not free. I want to write code to solve business tasks, not just patching working code because of one more imperfection they found.
I can run HL1 on Windows 10 but my 5-months code for Angular is outdated.
Please, Angular team, be more pragmatic.