I suspect too much is broken (well, I'd say more clearly "crap") in C++ to be sure whether any particular core ideas hold up based on that whole language.

I'm particularly mindful of C++ 26 Erroneous Behaviour for initialization. This idea was introduced for the forthcoming C++ 26 language version, it says that although just making a variable `int k;` and then later taking its value is an error, it's no longer Undefined Behaviour, the compiler shall arrange that it has some specific value.

This is a meaningful improvement over the C++ status quo. But, that doesn't mean the core idea is actually good. It's bad to do this in your language, they didn't have any better choice for C++ for historical reasons so this was the least bad option.