The people who did contracts are aware of ada/spark and some have experience using it. Only time will tell if it works in c++ but they at least did all they could to give it a chance.
Note that this is not the end of contrats. This is a minimun viable start that they intend to add to but the missing parts are more complex.
Might be the case that Ada folks successfully got a bad version of contracts not amenable for compile-time checking into C++, to undermine the competition. Time might tell.
I strongly doubt that C++ is what's standing in the way of Ada being popular.
Ada used to be mandated in the US defense industry, but lots of developers and companies preferred C++ and other languages, and for a variety of reasons, the mandate ended, and Ada faded from the spotlight.
>the mandate ended, and Ada faded from the spotlight
Exactly. People stopped using Ada as soon as they were no longer forced to use it.
In other words on its own merits people don't choose it.
On their own merits, people choose SMS-based 2FA, "2FA" which lets you into an account without a password, perf-critical CLI tools written in Python, externalizing the cost of hacks to random people who aren't even your own customers, eating an extra 100 calories per day, and a whole host of other problematic behaviors.
Maybe Ada's bad, but programmer preference isn't a strong enough argument. It's just as likely that newer software is buggier and more unsafe or that this otherwise isn't an apples-to-apples comparison.
This is some pretty major conspiracy thinking, and would need some serious evidence. Do you have any?
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Okay, on one hand, I'm very curious, but on the other hand, not really on topic for this forum. So I'll just leave a "wut".