I've been using Zellij on both Linux & Mac for around six months.

It's great! For someone who wants a terminal multiplexer but a) doesn't feel like learning all the idiosyncracies of tmux and b) is OK with adding some configs in toml — it's ideal.

The downsides are that it's not perfectly stable — maybe once a month I get a panic — and some terminal cobwebs aren't encapsulated — e.g. it's not possible to use "[" in key mappings.