Theoretically you could cross-compile it to any architecture Rust targets, probably that uses the same display type as Kobos (I haven't looked at the code closely enough to see if it implements the display drivers itself or uses bindings from another package). In practice, as far as I know Plato has only been compiled for Kobo devices, and most of the other mainstream ones make it hard-to-impossible to run arbitrary binaries (It's not super-easy on Kobo devices either, but it's relatively straightforward and doesn't involve having to seriously modify the device and/or circumvent security protections)