I've got a bit of a rareity in my shed.
A Moulton Mini with the rear carrier boom STRAIGHT
The usual course of events was the rider of the bike would have their friend
sit or stand on the backrack; and whoops.... rear rack pressing on rear mudguard.
How many Moulton Minis do you see without a backrack?
And also, my BSA 20 has a FORTY hole rear rim. This is because they were known by Raleigh ( but not publicly announced ) to be converted to a passenger transportation system with makeshift rearfacing seat installed.