Am 15.03.2019 um 11:11 schrieb Carlo B. <carlo.bramini@gmail.com>:

In my opinion, if it is possible to run x86 apps on an ARM CPU, it
should be also possible to make the opposite, to run ARM64 apps on a
x86 CPU, by using a similar setup. Unfortunately, I'm not aware of the
changes for making this possible, but I think it could be made.

Correct, there's nothing to stop that conceptually. It's just that you're going to hit unique bugs, and I am sure nobody tried before.

It's all free software, you are welcome to improve things :-) .