No, you are wrong. DOS COM files if 16 bit can't be run on 64 bit CPU's but 32 bit DOS binaries can be run under 32 bit GNU/Linux installs with DosEMU straight by just emulating the BIOS part, the rest is native.
Set seg_32bit=0 and you can create 16-bit code and data segments. Still works on 64 bit. What's missing is V86 mode, which emulates the real mode segmentation model.
50/50, because once you boot a 32 bit os you can run 16 bit binaries :)
I'm pretty sure that if I make a dual-kernel 9front (9pc and 9pc64 available at boot) in a 64 bit machine and I compile emu2 for it, DOS COM binaries might be trapped enough to run simple text mode tools under the 386 port.
https://man7.org/linux/man-pages/man2/modify_ldt.2.html
Set seg_32bit=0 and you can create 16-bit code and data segments. Still works on 64 bit. What's missing is V86 mode, which emulates the real mode segmentation model.