So much old software that I once used simply could not jump the gap from Intel x86 to ARM. What about Haiku? I remember playing around with that in an x86 virtual machine, but alas, I cannot bring those x86 virtual machines with me.
But, lo and behold, apparently Haiku os does run in ARM! Now I just need to figure out how to set up a virtual machine of it on a Raspberry Pi. However, please note that they still say that it is extremely unstable and experimental.
20200101/DuckDuckGo haiku os arm
20200101/https://www.haiku-os.org/guides/building/compiling-arm
Okay, I was definitely speaking too soon. Chances are that many of the other libre operating systems also have an ARM port in the works.