That Copilot feature is very useful actually, the summarize is good enough for a free AI with no ads.

I think the title would better if it is "Zas Editor, only for Mac".

It only mentions this at the very bottom of the page. Either other platforms are considered at some point, or be clear about this.

The screenshots suggest macOS use, but you can't be for sure as any program can be rendered like this on a mac.

An ToDo app which could save and sync with single text-like file. Yes, what I want is an cross platform, modern UI Emacs and `the` org-mode :)

What about Notable? https://github.com/notable/notable

Try note plan. https://noteplan.co/

I’m not associated but tried it and liked the features.