I read somewhere General Motors requested Phillips screws to cam out to prevent assembly line workers from over-tightening fasteners.
Here in Canada Robertson heads (a Canadian invention!) are predominant.
I carry a Wera textile belt on my pants clip with 3-8 mm hex and 8-10mm sockets. Most have Wera’s holding function which prevents dropping bolts or nuts onto the floor. I run a shop and time is money!
I carry a Wera 1/4” drive speed ratchet in my apron - so very little weight. The 180 degree pivoting head means I can switch from it being a ratcheting spinner to a levered handle ratchet in practically no time.
As the saying goes, you’ll have to pry this from my cold, dead hands.
I also buy most Wera from Bike-Components.de as it’s about half the price versus buying in Canada.