Quote Originally Posted by jatt View Post
Despite the fact my schooling was done with the metric system, have had to become reasonably familiar with imperial -- dealing with "old people" (ducks a flying spanner). Then theres the fact that a fair bit of the caravan stuff I deal with is still in feet. So I ensure all the tape measures in the shop have both measurements on them.

Base 10 number system --- dunno how difficult that can be!!

Bought a block in town about 15 years ago -- damn thing was still measured in links (subset of chains apparently). Even my solicitor (well into his 60s back then) had to pull out the conversion tables for that one.
Aha; term "flying spanner" tells us which direction to aim..... JK of course.
I've been subject to practice of dual-dimensioning and conversion awhile. Like hemmjo states, there is room and application for either. I do little programming, conversational at that. In most instances, mm entries are [seem] less susceptible to keystroke errors.
I'd say being able to select via touch of a button is best of both worlds.