yeah, definitely worth keeping an eye on the price of OLED displays.
the cheap ones are quite small still. (I guess same size as on minilogue?)
I will say the parva oled has come under some criticism, some say its too small to read (easily) , and others that its not bright enough. but still looks nice
I do think, once the resolution increases (as it would for larger oled displays) it makes sense for the oled to also be controlled by a dedicated controller rather than axoloti directly, so makes sense to use something that already has software to drive it. then its just a matter of sending parameters/display data from axoloti.
... and of course, we shouldn't forget axoloti control is still 'in the works'