Public clouds don't dictate what people use. You can freely run windows or any other OS on an AWS or Google VPS, it's just people very seldom choose to do so, because (this is the punchline), linux is just that much more popular and developer-friendly.
The domination of linux in the hosting / server world predates the existence of public clouds. I was there, I remember.
At the turn of the millennium for a very very brief time there were a lot of windows servers running ASP.NET. That was it. Nothing has come close to linux since then, and it has absolutely nothing to do with what AWS/GCP offers. What they offer is entirely beholding to what developers like.
The domination of linux in the hosting / server world predates the existence of public clouds. I was there, I remember.
At the turn of the millennium for a very very brief time there were a lot of windows servers running ASP.NET. That was it. Nothing has come close to linux since then, and it has absolutely nothing to do with what AWS/GCP offers. What they offer is entirely beholding to what developers like.