I rarely use SumatraPDF because I often switch Mac-Windows. That said, I certainly appreciate small fast software, e.g uTorrent. It's small because it's Window

I rarely use SumatraPDF because I often switch Mac-Windows. That said, I certainly appreciate small fast software, e.g uTorrent. It's small because it's Windows only, and very likely avoid cross platform libs and rewrite everything on their own. For writing personal project, I agree cross platform my be over-rated. Just stick to your favorite platform. Make it works and optimized.