Comment by incr_me

How is File Pilot for accessibility and for all of the little niceties like native scrolling, clipboard interaction, drag and drop, and so on? My impression is that the creator is has expertly focused on most/all of these details, but I don't have Windows to test.

I insist on good UI as well, and, as a web developer, have spent many hours hand rolling web components that use <canvas>. The most complicated one is a spreadsheet/data grid component that can handle millions of rows, basically a reproduction of Google Sheets tailored to my app's needs. I insist on not bloating the front-end package with a whole graph of dependencies. I enjoy my NIH syndrome. So I know quality when I see it (File Pilot). But I also know how tedious reinventing the wheel is, and there are certain corners that I regularly cut. For example there's no way a blind user could use my spreadsheet-based web app (https://github.com/glideapps/glide-data-grid is better than me in this aspect, but there's no way I'm bringing in a million dependencies just to use someone else's attempt to reinvent the wheel and get stuck with all of their compromises).

The answer to your original question about why these billion dollar companies don't create artisanal software is pretty straightforward and bleak, I imagine. But there are a few actually good reasons not to take the artisanal path.