Since you work at Google, you should be well aware of the deprecations. You don't need evidence of their existence, you just don't see it as a problem. Which you are free to do, since it's not a problem for you, it's just a problem for GCP clients, many of whose complaints you seem to be dismissing as not being "data".

GCP doesn't seem to provide a full list of deprecations, but the list for just one service[1] is pretty terrifying when you consider that your app might depend on two or three dozen services, and a deprecation in just one of them forces you to rewrite perfectly good code. A cursory search reveals a number of reports of being repeatedly bitten by deprecations[2][3][4], so no one should be mislead by the dismissals here. [2] has a good cautionary tale of a forced "upgrade" leading to potentially much greater cost.

[1] https://cloud.google.com/appengine/docs/deprecations [2] https://nilsnh.no/2019/11/09/managing-the-google-cloud-platf... [3] https://www.slideshare.net/async_io/lessons-learned-from-bui... [4] https://www.lastweekinaws.com/podcast/aws-morning-brief/whit...