Which Groupset?

How many failures of 11 speed Shimano have you seen Ed?

Seen plenty with the 10 speed due to accelerated wear and tear (poor maintenance and the like).

Isn't 8/9 speed chains are generally stronger than the 10/11 speeds one?

Plus, bike shops in the middle of nowhere tend to have limited stick of new new things, or even non-standard parts.

I work in a bicycle shop 20 miles outside London, we don't stock 11 speeds or Campagnolo (oddly enough have some belt drive component), it can only be ordered in from the distributor.