My criticism of the JVM is that it is no longer useful because we don't do portability using that mechanism anymore. We build applications that run in containers and can be compiled in the exact type of environment they are going to run inside of and we control all of that. The old days of Sun Microsystems and Java needing to run on Solaris, DEC, HP, maybe SGI, and later Linux, are LOOOOOOONG gone. And yet here we still are with portability inside our portability for ancient reasons.

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gf000 3 days ago | parent [-]

If you believe that's the reason for the JVM (and that it's a "VM" in the traditional sense), you are greatly mistaken. It's like saying C is no longer needed because there is only Arm and x86..

The JVM is a runtime, just like what Go has. It allows for the best observability of any platform (you can literally connect to a prod instance and check e.g. the object allocations) and has stellar performance and stability.

	▲	cogman10 9 hours ago \| parent [-]
		I don't think that's a mistake. Besides the promise of memory management the "write once run everywhere" promise was a huge selling point of the JVM. So much so that Bill gates famously was terrified of it. "I am literally losing sleep over this issue since together with a move to more server based applications it seems like it could make it easy for people to do competitive operating systems." [1] [1] https://www.joyk.com/dig/detail/1672957813119759#gsc.tab=0