I don't know that much about Java world, however what I can say about Windows + .NET is you are less productive. Why ? 1. Linux > Windows ( For .NET ) 2. Python

I don't know that much about Java world, however what I can say about Windows + .NET is you are less productive. Why ? 1. Linux > Windows ( For .NET ) 2. Python + Django/Flask are really powerful. Ruby & Rails as well. 3. You're basically writing and reading more code. Most of them is unnecessary. .NET is designed for enterprises. 4. Especially for startups, time & speed matters a lot. I also think some of the above reasons applies for the Java world as well. Fantastic OS projects though in Java world.