Arduino for STM32

That's pretty cool! I've always been interested in experimenting with microcontrollers, and your project seems like a fun way to learn. Your explanation made it easier for someone like me, who might not be a pro at this, to understand the concept. Though I prefer board games with dice roller online ...

In my experience, the stm32duino framework is pretty reliable for small commercial products used in non-critical business applications. Some professionals may indeed dismiss it as hacky, but as long as you're not trying to use it for something critical, it should be fine.
As for bad habits, I think ...