On the top of my wishlist is first-class LLVM/Rust support. Rust helps with catching bugs at compile time (borrow checker) = huge time saver especially for embedded devices additive types/enum with additional data! No more the unsafe "function(enum_selecting_function_mode, &pointer_to_mode_dependent...

MIPI DSI: If you're in real need of it, the ESP32 can actually fake MIPI compatibility with an external flipflop and some resistors. I have that working now, will publish the project eventually. Agreed that compatibility can be useful; will take a look at it. Larger flash ROM for data: You are awar...