Big cloud provides will take the opportunity to move to ARM as it is cheaper for them.

The cloud isn't a literal empheral cloud. It's still a physical thing with physical devices physically linked. Physical ram on physical slots with physical buses and physical chips (not just CPUs, many other ICs are in those machines too). The complexity of the demands of the arrangement and linkages of that physical hardware is incredible.

Nobody is out there writing enterprise server firmware in java. How can you have a java VM when the underlying compents of the physical device don't have the necessary code to offer the services required by the VM to run?

To be incredibly blunt, and I don't say this to be rude, your questions and assertions are incredibly ignorant. So much so that it's essentially nonsense. It's like asking "why do we still even have water when we have monster energy drink?" It demonstrates such a fundamental misunderstanding of the premise that it's honestly difficult to even know where to begin explaining how faulty the line of thinking even is.

Linus isn't talking about JS developers at all. Even a little bit. I promise you, you would not enjoy hearing his unfiltered thoughts on JS developers.

He's talking about the professional engineers who design, build, and write firmware for enterprise grade servers. There no overlap between JS coders and these engineers.