The interesting thing in the UK is that the EGU used to offer a handicap service for golfers who didn't belong to clubs. The idea sounded grand in theory, but the scrutiny of score attesting wasn't possible to achieve. Plus, the EGU in part is meant to serve member clubs. It didn't make a lot of sense to give a reason not to join a club when memberships were trending downward.
Anyway, I think a world system is bad news because it attempts to jam several different golf cultures and histories into one no size fits all box.
The US experiment of inclusiveness clearly demonstrates that the concept is not necessary for handicapping because the vast majority of US golfers do their thing without a care in the world for an official handicap. In a very real sense the US is an outlier of major golf countries because the vast majority of golfers do not belong to a club.
Anyway, the new system is coming, its a done deal because the USGA and R&A know best. My question is how are the first 20 scores generated? For instance, in the UK are they going to use the last 20 posted scores or seek 20 new scores to issue a new handicap?
Ciao