What is Threads?

It seems like a lot of people are on Threads. But I really don’t want to join. I don’t want to know what it is. I spend too much time on various sites and I don’t have the time to throw at another one. Plus I heard if you leave Threads they close your Instagram account. Is that true?

Can anyone out there persuade me to join?  Is there an advantage to it? It is apparently a writing based site, it sounds like tou can’t post images to it. But I love art and wouldn’t want to leave it behind. Let me know if I’m wrong.