When you drop it on the granny ring then you should walk and hold your head in shame.
Get rid of the granny ride, MTFU and hurt yourself.
The next time you will be stronger.
My first post was a bit of a wind up.
Efficiency, depends on lots of factors out on the trail,the person and the bike. I can ride 99% of things in the UK on a 44-32 front and 32-11 on the back, got rid of my granny when i fitted the chainset. Live in Rivvy and no problem, unless its a mega bog fest. Raced the Whinlatter, Mary Townland, Brownbacks, Lee Quarry and Wiggle 6 hour enduro etc., never got off and pushed. Its a personal challenge thing for me.
Saying that i do a lot of cycling so have the "skillz to pay the billz" 😛 and also a decent level of fitness.
Sometimes if your wrecked, dropping it into the granny is a good way of spinning and recovering, flushing all the cr4p out of your muscles rather than getting off and pushing.
Horses for courses, if your out for a lesuirely ride or potter do what you feel is best for you, more importantly enjoy it and dont stay in and watch cr4p tv EVEN if its raining, you wont melt. 😆