One of the attractions is, the chip is easy to use and understand (and cheap!). If they change things (like the Leonardo for example) then a lot of existing libraries will stop working, because they will be relying on having the exact hardware.
One of the attractions is, the chip is easy to use and understand (and cheap!). If they change things (like the Leonardo for example) then a lot of existing libraries will stop working, because they will be relying on having the exact hardware.