I use the compose key on Linux and free software called wincompose on Windows — this allows me easy access to real characters easily, so I can say 25¢ instead of $0.25, or talk about how it's only getting up to around 65°F today, or since I'm in the US and have the dollar sign easily but I have a couple of online services in the EU, I can easily say I pay €10,95/mo for one of them.
I prefer using the actual characters - so when I say ¿Por qué no los dos? it's correct.
One of the things that has absolutely pissed me off is em dashes becoming more common and attributed to AI. I use the fucking things because they are useful and I've used them for 15+ years. It used to be a Good Thing™, but now occasionally gets me accused of being AI. Especially since, as you can see by this very reply, I afraid neither of writing nor reading, and because of my ADHD, I tend to run a bit on the verbose side of things.
I guess, thinking about it, I'm in the same boat as artists who now face similar accusations. I suppose I'm lucky, though, as the accusations against me are rare, comparitively.
Real people absolutely do use em dashes and always have. Certainly it's less common, but absolutely a thing.