Would anyone still use a desktop-only (no mobile) messenger where you have to run/turn on intentionally (not always-on like most mobile-first messengers nowadays), lists online/offline friends the way AIM/ICQ did, and you can only send messages with online friends?
I get that most leisure computing has moved off of desktop to mobile in modern days, but there's definitely enough of us nerds who're on a computer a lot (even if just for work, if nothing else). It can't be any less than in the late 1990s when ICQ was popular.
I think it probably is less. I’d hang out on my laptop in the evenings and mornings (like, while watching TV or reading news when eating breakfast) in a way I don’t now. I use my iPad or phone now.
I do wonder, though, if there’s a gap for a messenger app that runs only while in the foreground in your phone [edit: or tablet or computer!] - or maybe until you next lock the screen, so you can ‘be online’ only while reading, playing a game, or doomscrolling.
I get that most leisure computing has moved off of desktop to mobile in modern days, but there's definitely enough of us nerds who're on a computer a lot (even if just for work, if nothing else). It can't be any less than in the late 1990s when ICQ was popular.