Get to the top/bottom of a page, get to the beginning/end of a line when entering data/coding, activates End Mode in Excel, probably more things I can't think of right now

Seems like I'm in the minority of using them though, because a lot of 75% keyboards seem to omit one or both, especially if they're DIY kits

Your layout would be great for me if it were that way and with tri-mode though. Would save me the hassle of having to have a separate num pad plugged in to put on the left side of my keyboard while my keyboard is wireless (currently using an Akko 75% that way)