Comment by defrost

FWiW I'm old enough to have navigated via LORAN and travelled through over two thirds of the 190+ countries on the planet tying in multitudes of old datums to the "new" WGS84 standard as part of a career in geophysical surveying (Gravimetrics, tides, magnetics, radiometrics, EM, etc.)

I'm not old enough to have seen Great Britain and relate isles pressed down by the weight of kilometres of ice though .. that'd be a great great great grand something that saw that.