The better question may be: How are you defining an interaction?
This may be a hot take, but I don't consider HN to be personal interaction. We post content individually. We read it individually. Replies are about the content, not about the person. I am replying to something you wrote, but know nothing about you as a person, so it is hard to claim we have a personal interaction together just because of this comment.
I agree that personal interactions are hard to come by online, but this is different to interacting with people at a surface level online.
I've seen on many long-term forums, or even sub-reddits on Reddit, people really get to know each other.
I have 2 accounts that anyone could argue are social media and this is one of them. The other is so specialized that I'm fairly sure no one here uses it and I mainly use it for reference. An account was needed to search. Since I have an account, I will occasionally provide an answer to someone that has a question that I've had in the past, but even that's rare.
Otherwise, I use Teams at work, but that's not social media.
I am a person. You have interacted with me using tech.
How are you defining "tech" exactly? I use messaging apps all the time to organise things with friends or talk to distant family members. There's no better way to do it, I can't meet everyone in person and if plans change, it's better to know sooner.