The ARM Based processors running Win10 require 32bit versions of the programs. so you could see the amount of people requiring this increase now.
In this case that wouldn't be the case as Curtains would require a 64 bit native ARM version of Curtains not a 32 bit Intel one. A 32 bit one wouldn't work either (most intel 32 bit apps can run under emulation, but Curtains wouldn't due to how it works)
We are unsure if there is sufficient demand for an ARM version at this time.