But still we can separate desktop and mobile experiences and use cases.

Sure, majority of apps should have desktop version and a mobile version. Social media or messaging apps you name it. A lot.

But with this one I wanted to focus on desktop. A lot of things are still better (or different) on desktop. You have your keyboard, big screen, mouse and your focus time. Mobile is one big distraction and people use it while traveling to kill some time mostly. I want to build desktop and web software for the productivity time people spend on computer, laptops. It's just a small piece. I may be biased but looking at what I do and people around: desktop use time is way different that mobile use time and I want to simply target for desktop.