Facebook has a number of pages devoted to railway nostalgia. There are opinions stated regularly that the Great Central should not have closed. In particular many bemoan the closure of Nottingham Victoria station.
The Great Central was the last major route to be built. Unfortunately all major centres of population it passed through were served already by existing lines. Duplication of routes is not unusual in the UK as private railway companies competed for traffic. Most of the collieries and steelworks in Yorkshire, Nottinghamshire and Derbyshire were served by two competing railway companies. Nationalisation of the railways in 1947 provided an opportunity for rationalisation and the end of duplication. The downturn of the steel and mining industries took a lot of traffic away from the railways, as did the expansion of road transport.
So, the Great Central had to close.