Microcontrollers have got a lot more accessible since Arduino. There's lots of beginner material out there, although admittedly not on Medium. (Unsurprisingly, the people involved prefer a more bare metal approach and put it on blogs or forums instead)
The tooling is nearly always C, so it's interesting to see Rust moving into this space. Memory management is not so much of an issue, but multitasking correctness is; perhaps there will be some new micro-RTOS framework with provably correct interrupt handling. (We have sel4, but that's not quite the same thing)
As you get more low level, the tutorials get sparser. You move into FPGAs, where you have a choice of two languages with 1970s design principles, or third-party tools which work despite the manufacturer's total closedness. As you go deeper into actual IC design, nobody will attempt it without supervision from someone experienced to tell you all the little tricks. And then there's analog IC design, which is basically black magic.
The tooling is nearly always C, so it's interesting to see Rust moving into this space. Memory management is not so much of an issue, but multitasking correctness is; perhaps there will be some new micro-RTOS framework with provably correct interrupt handling. (We have sel4, but that's not quite the same thing)
As you get more low level, the tutorials get sparser. You move into FPGAs, where you have a choice of two languages with 1970s design principles, or third-party tools which work despite the manufacturer's total closedness. As you go deeper into actual IC design, nobody will attempt it without supervision from someone experienced to tell you all the little tricks. And then there's analog IC design, which is basically black magic.