Today, 12:16 PM · 63 replies and 1323 views.
That's completely true, and there's a good reason for that. The reason why decimalisation was brought in was to simplify mechanical calculations. This shows that there was a pressure for the change because these devices to do the adding up for us were becoming more prevalent.
One thing that happens when we let machines do something is that we start to rely on them and less proficient at doing it ourselves.
As for the Imperial System being easier than the Metric for mental arithmetic, well, I think that it really comes down to what you grew up with. There was a study done a few years back where old people were asked to do sums in Pounds Shillings and Pence. They found it easier to add up decimal money.
Just ask any Engineer about the reason why the Metric System is prefered, and they'll tell you about the units of length, volume, the density and boiling point of water. A Newton metre, a Newton over a metre, and a Newton over a square metre.