Technically speaking, things are far more secure today than they were back in the dawn of the internet. Protocols are now almost exclusively encrypted where they almost exclusively weren’t. Private communication is (in theory) easier to achieve.

Practically speaking, however, now there’s always somebody there attempting to monetise your interactions. To mine useful information from what you say, or to sell you something while you say it. Or both.

That’s only going to get worse with the rise of AI, as companies realise the vast databases of past interactions might actually be worth something.

Best you can really hope for these days is to retain some anonymity and some separation between your public personas.