Title says it all.
Bump.
The hobbyist-friendly development environments for Ada are practically non-existent, and the places that want and can afford a real Ada environment probably wouldn't touch hardware like Arduino with a 10-foot pole.
Meanwhile, you can get a free or cheap C compiler for nearly any processor that's been made since the mid-1970s.
As I said to the AdaCore people at the last tech show I was at: "Gee, for C/C++, there are all these vendors selling compilers and enhanced debuggers, and operating systems, and wireless stacks, and libraries that will make my IoT/MachineLearning/OtherLatestBuzzword work in mere days, and hardware vendors with free C environments, and all that. And for Ada, there is ... You."
Things are better than they used to be, I think. They said that the had tools that convert ARM .SVD files and/or C .h files into the equivalent Ada structure definitions (or whatever they call them.) That should be a HUGE help for the embedded space.
I'm not entirely happy with the C/C++ "monoculture" in the embedded space, but I doubt that Ada is going to catch on as an alternative. (How IS Ada doing, anyway? It's from "from 1977 to 1983 to supersede over 450 programming languages used by the DoD at that time", and my impression is that computer language development has been much more "biological" than officialdom would have liked, with individual languages dying out or becoming more dominant via a sort of "natural selection.")