Same with AWS, I've been using that since 2008 or so. At that time, many of the services, or functionality within certain services were either not usable (as in couldn't be accessed) via the web interface, only via the APIs.

I see a constant flux of features, but the whole Google Cloud ecosystem is well thought of and coherent as if the ease of use is primary thing. App Engine, after 8 years, is still as easy to use as the day it was released.