Ask HN: What's your preferred toolset for developing desktop GUI applications?

I'm an C++ embedded firmware developer day to day, also competent with Python/Javascript. I've been working on a nodejs website for the past year or so, so I've got a feel for designing basic web gui's with HTML/CSS/JS.

For my next project I was thinking about trying to build a touch friendly code editor/browser. I've never built a desktop GUI application before, so I thought it might interesting to see what most people in the community prefer to use. I'm working on Windows, but cross platform capability would be ideal.

From my preliminary investigation, QT seems to be the standard choice. I'm not sure how suitable it is for a touch friendly application. Electron also seems like a possibility, though I've read it can be slow and resource hungry.

What do/would you use?