Thinking back, pre satnav, I'd just write down the major routes and follow the signs, but this was 30 years ago. It all just worked.
I tried the same this year going to Weymouth, years ago id use the A1, turn off at St Albans to cut off a section, onto the M25 etc etc. I just got completely lost, like the signage just disappeared. I think there's just so much traffic, so much extra to watch out for, its harder than it used to be, just the volume of concentration needed is so much higher now and you miss one major point, it all goes Pete Tong very quickly
Arriving at Weymouth, I used to know it like the back of my hand, its all changed, signage taking you on roads that didn't exist years ago, taking you routes that didn't make sense...probably all in the name of taking traffic away from the town, tripling the distance and time needed to go from A to B.