I think Ada's future is in safety-critical systems, where it makes sense to invest heavily in correctness, with the option of using SPARK and formal verification. Additionally, Ada has several mature compilers suitable for life-and-death applications.
For more ordinary software though, doesn't Rust make more sense? Its approach to memory management for instance, with a borrower-checker, seems much nicer than what Ada has to offer.
It would be fair to point out though that Ada has had decades to catch on and replace C, but it hasn't done so, except in certain narrow areas of highly critical embedded software development in aviation and military applications. My understanding is that it's not easy to work with for 'general purpose' work (command-line applications on GNU/Linux), as it lacks mature bindings.
I think it's fair to say Ada failed to truly embrace Free and Open Source software. A pity, in my opinion.
Well they are trying to reach FOSS community. Recently they started survey asking community "Hello here, we (AdaCore) have some plan for the future of GNAT Community that we want to share and have your opinion on: https://forms.gle/Q34myTCQUXvrva5n7
"
There is Ravenports very good port manager written in ada for FreeBSD so ada can be used for CLI apps and has good gtk binding too