People generally say Azure suits the enterprise, AWS suits tech-driven companies (i.e. those where the CEO knows what an API is), and Google supports special/hobby projects. Google is probably awesome but nobody trusts them to not just abandon the whole thing in a few years time.
Amazon and Azure are going to be around for at least a decade.
Google is not going to abandon cloud. I'm not sure anything I say can convince you, but the fact the Spotify, Evernote, Disney, Home Depot, Snapchat, etc all run on GCP says a lot.
Google doesn't have a good track record supporting its products. I have no doubt that GCloud will stick around, but the fact remains that Google has trust problems.
This comes up sometimes, and is really not well supported. Happy to discuss every time it does come up :)
Google Cloud is paid b2b, not free b2c - companies like Disney, Spotify, Evernote build very close multi-year relationships with Google, rely on Google, pay Google, etc. Google Cloud going away would shut down, for example, all of Snapchat.
I understand that, which is why I don't worry about the future of GCP. However, the negative perception gained from some of those free b2c endeavors will still damage the reputation of unrelated Google products and services like GCP.
Amazon and Azure are going to be around for at least a decade.