I'm not sure if you've ever been in factories or down anything B2B but verified, tested, and universally supported is much much more valuable than one may initially expect. Absolutely no one wants to use a product or service whose existence or support may disappear in a few years or is equally unknown or untested. A government could decide to switch and then get backlash for having a new system that isn't fully or perfectly identical/interoperabile shoved down constituents throats and then deciding in just a few year that the adoption cost isn't worthwhile. The global economy is still running on code written in Fortran and B because it's so vital no one wants to risk changing something that's working.