There are reasons to be worried about additional safety beyond just security. My first thought when reading the article was it would be a huge bummer if a bug in tmux brought down a long-running or particularly stateful session. Of course, I’ve never encountered such a thing in my own usage, but if you could make it less likely that alone seems like a value add
If tmux was a new project then I'd agree with you. But, like yourself, I've using tmux for probably close to 15 years now and never had it crash once.
In fact the author of this project has admitted that they've introduced bugs with their rewrite. I know it's a hobby project so I'm not being critical of their work. But if we're only interested in reducing bugs then rewriting an existing project isn't the right way to go. Something like Zellij makes more sense because it's offering something new in addition to being written in Rust.
