The current GT3 and GTE classes are by far the best forms of racing on the planet currently. When you factor in the huge number of manufacturers/cars, how cool they are, their speed, and of course the competitiveness of the races, there's nothing better. It also helps to have have them as the top class in a lot of these types of races.
It might not be as cool/exotic as the late 90's GT1 class, but it's better racing, and obviously much more sustainable.