Interesting. I would say though, that even if a small band of clubs; in particular Liverpool were dominant, they weren’t winning leagues with 90-100 points per season.
The old adage of win at home and draw away would more often than not win you the title.
2 points a game used to be enough now it’s 2.5. That for me is the worrying thing and a sign of an uncompetitive league.
78/79 Liverpool won the league conceding only 16 goals and winning 30 out of 42 games (drawing 8 and losing 4).
18/19 finished 2nd winning 30 and drawing 7
19/20 finished 1st winning 32 and drawing 3
20/21 finished 3rd winning 20 and drawing 9
Not too much difference!