I had 17 font resources set up to use 3 different fonts and 2 font sizes. Just trimmed that down to just use 2 fonts. The third font did not fit, idk what I was thinking. Now just 4 resources, each font at one of two sizes.
GM:S2 stores fonts as sprites and saves each character location as a box on the sprite sheet. Deleting all those fonts resulted in a 25,000 line deletion commit. Wowza.