Just appalling. Someone publishes a post about their WIP project reaching an important milestone, and here comes the naysayers whining about the fact it's not finished yet.
Did you even the article? He clearly states his aims to convert it to safe rust. And for the code size, he clearly hasn't needed to optimize it yet and I don't think you necessarily want to code golf codebase like this.
The problem is that the "Introducing..." framing generally implies at least a worthwhile MVP, and OP doesn't have that just yet. If it was titled "A feasibility study towards rewriting tmux in Rust" I doubt anyone would've complained.
If your "honest opinion" is just a take down without much thought behind it, you could just as well keep it to yourself is my opinion. If you want to provide criticism, please at least put a little effort to it. So simply referencing the article can't refute you.
Did you even the article? He clearly states his aims to convert it to safe rust. And for the code size, he clearly hasn't needed to optimize it yet and I don't think you necessarily want to code golf codebase like this.