Yes it's been done a bunch of times in the past, see https://en.wikipedia.org/wiki/Tagged_architecture https://en.wikipedia.org/wiki/Tagged_architecture. Probab

Yes it's been done a bunch of times in the past, see https://en.wikipedia.org/wiki/Tagged_architecture https://en.wikipedia.org/wiki/Tagged_architecture. Probably most notably lisp machines which the sibling comment mentioned.