Hmm... generally, I would say that is irrational. Unless you're assuming something like a 1990's Java Swing app, or a GTK app, that achieves cross-platform sup

Hmm... generally, I would say that is irrational. Unless you're assuming something like a 1990's Java Swing app, or a GTK app, that achieves cross-platform support at the expense of looking like crap on all platforms. However, based on the fact that this app has an "in-Chrome browser" demo mode available... I'm assuming that it's REALLY a web application, packaged up for desktop use (like the Atom text editor). Personally, I think that the Atom route of "HTML/JavaScript on the desktop" is a poor choice in most cases (a Bootstrap designer tool might be the rare exception). Regardless, there are multiple cross-platform frameworks out there today that look and work just great. Being turned off by cross-plat support is really an outdated bias, I think.