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A comment on Universal Binaries Using WASM. Parent comment
OS/360 (IBM z nowadays) and OS/400 (IBM i nowadays) work kind of this way.
The whole userspace is based on binaries deployed in a bytecode format.
They are than AOT compiled into native code at installation time, or anything there are system relevant changes, via a kernel JIT service.
Whole mainframe hardware migrations are possible without changing a single thing on the userspace, just doing a system refresh.
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OS/360 (IBM z nowadays) and OS/400 (IBM i nowadays) work kind of this way.
The whole userspace is based on binaries deployed in a bytecode format.
They are than AOT compiled into native code at installation time, or anything there are system relevant changes, via a kernel JIT service.
Whole mainframe hardware migrations are possible without changing a single thing on the userspace, just doing a system refresh.