For classical music it's a problem because the long track lengths mean that you'll have to flip the record over in the middle of a piece. This was enough of an annoyance that one French label in the 70s created special records just for classical music with extra tightly packed grooves that could hold close to an hour on each side (https://www.discogs.com/label/184887-Trimicron). The downside of this is that the maximum recording volume is significantly reduced so there's a lot more background noise than on a normal record.