Imperial never use it for any mechanical, electrical or measuring at work purposes although I do come across the odd thing now and then. I used to use BSW(generally oversize) and AF as well as metric when I first started work, and also on some of the projects on old Fords and BL stuff its AF, I still have the spanners for.
All the European and Jap stuff was metric.
Still use peoples weight and height from imperial, same with beer,petrol and oil, they will always be a pint or gallon.
Most other things I look at the litre and millilitre content for a guide.
I do use the odd term in money like 10 bob or thirty bob,and find it hard to shake these terms off.
Its a bit strange when I think of say butter, its in half pounds or Potatoes its 5 pound bags, I suppose its like the height weight thing its just how it looks really to me.
Going back wont happen as the young uns have never used it and it wont be of any use to them at all.
I think my generation are the in-betweeners in decimalisation/imperial.