> In any case, developers don't seem to be too keen on adopting Ada.
Yes, unfortunately; the trend seems to go in the opposite direction; but anyway: if I really wanted to switch to something new and spend the effort to invest in new tools and education, then I would rather choose a technology with a decently long track record demonstrating that it fulfills all my expectations because of which I left my original technology. Rust will take one or two decades for this; Ada/Spark has already been through this.