So how many embedded GUIs did the author actually write? He seems to have compiled an arbitrary list of 'hard things' or 'problems you may encounter'. But thes

So how many embedded GUIs did the author actually write? He seems to have compiled an arbitrary list of 'hard things' or 'problems you may encounter'. But these are presented so shallow, I find it hard to believe he ever struggled with them. Although he seems to push the opensource Renode at the end, I feel it is mostly an Azure submarine.