Even with administration change in the US there is a long-term initiative across multiple agencies to eventually move to more robust software, and a part of it is the push towards more safe programming languages (where safe means fewer memory issues, fewer vulnerabilities, less bugs in general, etc.). Similar government initiatives now start in Europe and elsewhere in the world, too.

This regulatory change is not new, it has been going on for years and will take more years to finish. And even without a regulatory pressure, the migration would happen eventually. Look at the cars. As they get more features like adaptive cruise control and various driver assistance features, the need for software that runs with no lag and is reacting to surroundings correctly and quickly becomes absolutely critical. Car companies now can go out of business simply because their software is buggy. The car vendors now produce more software than ever, and they are in dire need for better programming tools than ever.

Languages like Java, Scala, C#, Go, etc. cover many scenarios like cloud services and, for example, car entertainment system. But for devices, microcontrollers, real-time low latency systems etc. C and C++ have been the go-to languages for decades, and now it is starting to change, because turns out it is very, very hard to write correct, bug-free, safe, and secure software in these languages.

Rust is one language that is getting into this market: Rust Foundation established a Safety-Critical Rust Consortium last year, for example, and Ferrocene compiler has a bunch of certifications done already. Ada is another option that would work for many such use-cases, too. The selling point of Ada is that it's been around for a long time and many vendors already have established compilers and tools with all appropriate certifications and qualifications done for all sorts of industries.

So, it's not really "Ada is interesting" and more "Languages that can replace C and C++ are interesting".