Four devices is not "most". You had me excited that I might be able to abandon the proprietary UIs on my CRS326/CSS326. And I know those aren't the "real router" devices, but Mikrotik certainly refers to them as routers.
Here is complete list -> https://toh.openwrt.org/?view=normal
78 devices in total when you filter for mikrotik -> brand column.
Here is complete list -> https://toh.openwrt.org/?view=normal
78 devices in total when you filter for mikrotik -> brand column.