I'd rather just have the configuration file be simple and well documented and let me make the decision. My monitor running at maximum resolution is about 163 D

I'd rather just have the configuration file be simple and well documented and let me make the decision. My monitor running at maximum resolution is about 163 DPI, so an automated system could guess both ways. 200% scaling works well for me, and it's a single line of configuration, done once, and I don't have to worry about heuristics changing behind my back.