From what I remember from various posts, most other changes could be done gradually on the 2.x branch. Unicode couldn't. I may be mischaracterising it :) That

From what I remember from various posts, most other changes could be done gradually on the 2.x branch. Unicode couldn't. I may be mischaracterising it :) That said, I suppose it's wise to base MicroPython on the "live" branch of Python (3.x), not the legacy one (2.x), even if Unicode support is too costly for them.