I really get tired of converting from inches to metric.

According to the U.S. Central Intelligence Agency's online The World Factbook (2016), the only countries that have not adopted the metric system are Myanmar (also known as Burma), Liberia and the United States.
Is there some reason for this? Two lazy to change? To dumb to learn a new system?

Two sets of wrenches, two sets of sockets...

Things are sold in US measurements but when you actually measure them they are in metric dimensions. Water in plastic containers...16.9 FL or 1.05 PT or 500 mL.

Irritating!!

Billy


“Amazing! I’ll be working with Jaco Pastorius, Charlie Parker, Art Tatum, and Buddy Rich, and you’re telling me it’s not that great of a gig?
“Well…” Saint Peter, hesitated, “God’s got this girlfriend who thinks she can sing…”