I don’t mean to keep derailing this thread, but I sent an email today to ally_flywoo@outlook.com and flywoofpv@outlook.com requesting they create a line of “Ardupilot compatible” FCs using MCUs with >1MB flash. Specifically, I requested FCs using one of the following MCUs: STM32F745VG, STM32F765VG, STM32F765VI, STM32H743VG, and STM32H743VI. All are available in the 100-pin LQFP package, and I believe are pin-compatible with their existing FC designs. The STM32F765VI or STM32H743VI would be ideal, as the 2MB flash would make it compatible with all possible Ardupilot builds and features. I also pointed them to this forum should they have any questions.
I am sure the current chip shortage is causing all sorts of issues for FC manufacturing, and it is likely what caused them to start incorporating VE MCUs in the first place. Hopefully as supply chains stabilize they will be able to use a consistent MCU so we can purchase without hesitation.
If you are interested, I would suggest sending an email to the above addresses requesting an Ardupilot compatible FC line. Hopefully with enough pestering they will come through 