Instead we got UNIX and C.
Had Java actually been designed for where it stands today, instead for set top boxes and browser applets, retrofitting the value types, AOT compilation and low level capabilities already available in Modula-3 and Eiffel wouldn't be such an engineering feat that is already on 15 years mark.
Interestingly enough, value classes approach remind very much how expanded classes work in Eiffel.
Likewise money keeps being burned into making industry adopt a JIT compiler into CPython, which they could have been enjoying with Smalltalk and Lisp.
It may sometimes be the case that we say, oh, that particular feature of some unchosen language can be very useful for us now, but that is something very different from we should have chosen that other language - with all its pros and cons - back then.