We were even able to downgrade our cloud servers to smaller instances, literally.
I wish .NET was more popular among startups, if only C# could get rid of the "enterpisey" stigma.
Documentation is vastly better compared to Java ones, it's like day and night, LINQ is vastly superior to anything that Java offered - but i haven't used java in a very long time. And every time i had to write java it felt like i went backwards in time by 5-10 years.
If i remember right Java's webserver beats ASP.NET in performance benchmarks but .net's one performance is good enough that it does not matter until you hit really big usercount - and at that point you usually have to rethink your architecture anyways.
But frankly .net is still mostly Microsoft Java but with better developer ergonomics in my opinion. It did shed a lot of overengineered OOP legacy from .net framework days though and we're seeing major performance improvements with every version.
What was the last Java version you used? There has been a huge momentum in adding new features lately, granted, it is slower than in C# (Java's top priority is backwards compatibility, so it does not have the luxury of shedding old stuff or changing them once they are in), but in the last couple of years it has improved tremendously. The JVM (especially in the garbage collection front) but also the language - half of an ML-style language is there (for example, ADTs and pattern matching), the other half is coming soon!