I edited (not once) an assembly for AI that was almost 100MB in size in notepad. Took a few minutes to load, but then worked just fine. That was almost ten year

I edited (not once) an assembly for AI that was almost 100MB in size in notepad. Took a few minutes to load, but then worked just fine. That was almost ten years back. I can't comprehend how something today can't open a 2MB file.