Huge workforce to hire from (crucial for start ups), vibrant and huge cosystem, battle tested, can scale to pretty much any size, write once, develop anywhere,

Huge workforce to hire from (crucial for start ups), vibrant and huge cosystem, battle tested, can scale to pretty much any size, write once, develop anywhere, ... I know HN is a bit in a bubble but I've dealt with hundreds of startups over the past ten years and I can tell you that easily 90% of them pick Java from day one.