I opted out of split-screen in favour of inline with formatting and different colours... I always found it difficult to follow the split screen chats way back then ... that and it makes multi-person windows more difficult with smaller terminal sizes :-)
My dad and I have been using it for our instant messaging. We were curious how possible it would be to have timestamps on messages. I suppose we could reprogram the ASM, but x86 ASM is a little inaccessible :)
I really didn't expect for it to carry any social features or aspects, in fact the reason I built it was so that it was a ephemeral as I knew how to make it. Timestamps contravene this goal a bit... but if you are genuinely interested re: same, the mods to sshtalk would be quite trivial to add. Despite it being assembler, it is very easy.