> But no other environment have a goal to be backward compatible *forever*

JavaScript is often referred to as the "assembly language of the web". Did
any instruction ever get removed from the x86 instruction set? Will this
ever happen?

Also, modern C compilers still compile C code written in the 70s, even if
they use obsolete syntax (pre-ansi K&R parameter declarations). Did
features get removed from C? (I don't know the answer - anyone ever used
trigraphs?). Is this a problem for C programmers?

There is an issue of scale here. You can impose an upgrade behind a
corporate firewall; much harder in the open.

Bruno
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