TUIs already increased in popularity before agents became a thing. The low latency, the ease of remoting and the limited screen real estate which forces the developer to carefully design the interface are genuine advantages. I've been using mutt, vim, tig, tmux, newsboat, etc for over a decade at this point, and the cyberpunk feeling faded quickly.

The low latency and instant startup is by far the primary value add imo. Nothing else comes close.

The inherent lack of UI bloat is an added bonus.