The only (deal breaker for me ) weakness of zellij - doesn't support copy/paste from the keyboard (from the screen/scrollback) and doesn't support multiple copy/paste buffers.

I do that roughly every 60-90 seconds with tmux - so, until the zellij developers relent (they suggest the "proper way" of copy paste is to pipe the data into a text editor and use that - but has the downside of not supporting system copy-paste buffers.) - no options other than to stick with tmux (or fork zellij - but that seems a bit much....)