Depends what you mean by bad; it hurts trust. For instance the Appengine to Appengine 2 transition is a particularly painful one for a consumer who built an ent

Depends what you mean by bad; it hurts trust. For instance the Appengine to Appengine 2 transition is a particularly painful one for a consumer who built an entire business on it and I was part of a migration to address this. I had heard Google is unreliable in this aspect before but after this particular experience I will unlikely use or suggest Google for anything serious.