alt Hacker News> I wonder if C++ has some hairy concepts and syntax today
Both better and worse.
The current version of idiomatic C++ is much cleaner, more concise, and more powerful than the version of C++ you are familiar with. You don't need C-style macros anymore. The insane template metaprogramming hacks are gone. Some important things that were problematic to express in C++ (and other systems languages to be fair) are now fully defined e.g. std::launder. C++ now has expansive compile-time programming features, which is killer for high-performance systems code, and is more expressive than Rust in important ways.
The bad news is that this was all piled on top of and in addition to the famous legacy C++ mess for backward compatibility. If you are mixing and matching ancient C++ with modern C++, you are going to have a bad time. That's the worst of all worlds.
But if you are lucky enough to work with e.g. an idiomatic C++20 code base, it is a much simpler and better language than legacy C++. I've done a few major C++ version upgrades to code bases over the years; the refactored code base was always smaller, cleaner, safer, and easier to maintain than the old version.
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It's much simpler and better than it used to be but it's still pretty bad. As just one example off the top of my head consider the meaning of curly braces for initialization. There's several different things they can mean depending on the context. Good luck figuring out which set is currently in effect.
These problems will happen in some form for every long lived codebase. In 15 years you will have some regrets, and some of those regrets will be things that are all core APIs used everywhere in the code base and so impossible to quickly change.