I saw that he mentioned a few of them in the article. He writes:
I can tell you that virtually everything I’ve used, from networking (legacy to VPC) to storage (Cloud SQL v1 to v2) to Firebase (now Firestore with a totally different API) to App Engine (don’t even get me started) to Cloud Endpoints to... I dunno, _everything_, has forced me to rewrite it all after at most 2–3 years.
I can tell you that virtually everything I’ve used, from networking (legacy to VPC) to storage (Cloud SQL v1 to v2) to Firebase (now Firestore with a totally different API) to App Engine (don’t even get me started) to Cloud Endpoints to... I dunno, _everything_, has forced me to rewrite it all after at most 2–3 years.