Is it different?

Yes, I feel it's fundamentally a different conversation space. My intuition is to visually and programmatically keep them distinct rather than munging them together and being suprirsed when the medium that emerges from our sloppy invokation / frame is a confusing a nd jarring mess. Ooooo and look at me! Turns out I've got strongish feelings about this. I'd love to explore this tension in conversation. I also think I want to spend some time making sure we're on the same page about how threads work. The ssbdrv description about tangles is really on point and a great reflection of how things are working in threads (from my subjective perspective). Highly recommend reading the early part of that README