Why can't there be an “universal” programming language that serves all purposes? It could be argued that x86-64 is a universal programming language that curren

Why can't there be an “universal” programming language that serves all purposes? It could be argued that x86-64 is a universal programming language that currently serves all purposes across a very wide swath of all computation, modulo a number of interpreters, compilers, and VMs. Even that doesn't take care of literally all, however.