I think it's a miracle that people 2000 years ago were using the same alphabet as us. I guess it just goes to show how important the longevity of recorded information is.
Personally I always thought it was easier to have the line on the left side and then the different stuff on the right side. Probably from being right handed.
Eg: B D E H K L M N P R
Those all have a line on the left and the right side differs
Not sure if true but I did hear somewhere that a big part of the Roman changes were to make carving letters into stone tablets and buildings easier.
It certainly explains using more straight lines in eg M and N. But maybe the flip also makes it easier to carve if you're chiseling right handed? I'm imagining how I'd chisel a K.
