Looks great... if I used any of the things mentioned.
OK, I
do use Safari. But I can't remember ever using a built-in "Start page"! Didn't AOL have one of those?! I've always built my own. Why would I want to mess with changing what somebody else decided I should see?
I've also been using Chrome lately because the resource downloading scheme a course uses won't work in Safari. It was either use Chrome or GIT.
Having an updated URLMPro, I rarely need/use any kind of default page, anyway.
As I said, I'm just not even a minor portion of the market they are developing for. One day, however, I may even install
Catalina macOS 10.15!