What disorder are you suffering from? Please check who was bringing up PIMPL. Hint: it was the person who does not know what they're talking about.
> Which one is the argument against destructors?
oh. my. god. THE COMPLEXITY. The systemic issues.
> Copying and moving are solutions to problems you already demonstrated
Which? I presented my solution to the move problem, it was: just don't move. And for copying: it's very context dependent what "copy" should even mean. There is no point in general in making a single function.
This whole semantics infrastructure is all just there to allow generic template code, which results mostly in: very bad, bloated, and slow code that is full of forgotten edge cases. For example, to take a very popular example, std::sort. you can sort a vector of vectors, it would then use move semantics to swap elements. Fine: I would just sort pointers instead or come up with an ad-hoc solution that is way faster anyway. (other than the fact that general purpose sorting of longer chunks is quite rare in systems programming).
> This is double indirection. It is more allocations, more memory frees, more pointer dereferencing (all of which are slow) and not necessary.
My friend, you don't understand the first thing about how computers perform their work, let alone how you have to balance these concerns with software architectural concerns. You could convert all the std::vectors in your programs and access them using pointers, in most cases you probably wouldn't notice the tiniest bit of a performance difference.
But the reason why C++ likes to embed "objects" as values (even though that's almost invariably bad from an architectural standpoint) is almost entirely unrelated to performance (with the caveat that embedding might save you a couple heap allocs and frees, but for real stateful objects & data structures, that isn't a good reason to embed). Of course you shouldn't add any indirection for objects that aren't really objects but merely a scope-exit, like lock_guard for example.
The primary reason is because it painted itself into that corner. It's syntax & semantics. You wouldn't "profit" from RAII if you added pointer indirection to your objects. (To fix that, later std::unique_ptr<T> was popularized, which again is an embedded struct but contains only a pointer -- which in typical C++ manner introduced its own additional horrors).
Another reason why C++ wants to embed objects is that its operators (like operator[], operator+ etc.) are defined on "value" type syntax expressions. Well it's basically the same reason as above RAII argument, since that argument is about the destructor-"operator". You cannot call methods & operators on pointers. You cannot do `std::vector<Foo> *ptr = ...; do_foo(ptr[i]);`. Get it? The best you could do would be `do_foo(ptr->at(i))` but it's not the same. Part of the reason why C++ calls methods on value type expressions is of course C compatibility, C++ can't afford to mess with pointer syntax and arithmetic.
I'm sorry. C++ is broken.
> How many did you read?
Way too many.