I see chats as one continuous conversation

Well there is your answer.

If you would view them as individual conversation then putting a greeting at the beginning of each makes perfect sense.

Most people consider conversations ended if neither party adds anything for a space of time.

A reasonable space of time is definitely overnight.

A lot of people literally wish you have a good morning. Those are saying this because they like you and hope all is going smooth for you.

It’s interesting how some things have changed over the years when it comes to chat rooms. And how other things haven’t. When I first started in The Palace the internet was new, and chat rooms were for shut-ins, agoraphobes, and nerds. We basically lived on the internet. So it made sense to some to treat the room as a place you entered and left.

Now you can sit on a discord server on mobile and have a life, pop in the middle of a conversation somewhere and then leave it. And some servers still suggest you greet a room like you live there.

It’s like, when I was a kid, having internet access to all human knowledge, anywhere, would have been a divine gift. Now we all have computers in our pockets and some people still argue about basic facts that can be resolved instantly. We treat technology very strangely.

If you’re talking within the same day, I would consider it fine to continue talking.

…But if you’re talking overnight or longer, I feel like you need a greeting of some kind to acknowledge that the time has passed. I wouldn’t call it rude not to, but it’s an extra pleasantry.

If there’s been a pause of several hours, people consider it a new conversation. “Good morning” implies that the speaker assumes other participants have slept overnight.

Some people like saying good morning. Maybe the chat is just a handy channel to say good morning to you.

To me someone saying good morning in a group chat is usually a bit of a fuck you to other members that aren’t having a good morning.