In 1977 the Aberdeen Inverness railway service was 2 hourly-ish in each direction and while better than nothing, that was about it. The station at Dyce reopened in 1984.
The frequency of trains serving Dyce only increased in the last 3 or 4 years.
Given the run down state of the Aberdeen Inverness line in 1977, I am pleasantly surprised it is with us today.