The way we socialise has changed to the point where it's normal to talk to people over text chat. This leaves a footprint that talking face to face with someone does not.

In addition to other privacy concerns, I don't want things I say that I would've gotten away with had I spoken it to my friends in real life, to come back and haunt me, either by a platform having a massive data breach, or it being used as evidence in a legal case against me.

On that last point, I'm not using chat services to organise crime, but taken out of context, any message I send can paint a picture that I'm an awful person and change some jury's opinion of me. This isn't something I want to think about before sharing a dank meme to a friend on discord.