What's notable about this season for Matthews is how concentrated his goal scoring has been this season. In his best 14 games this season, he's got 34 goals. [Why 14 games? Because Matthews now has 14 2+ goal games, it's the 65th time in league history someone has 14 or more 2-goal games, and everyone else I looked at for this had at least that many as well.] If you compare that to other great (70+) goal scoring seasons of the past, those guys had similar "top-14 game" marks. OK, except for Gretzky, he had 40+ goals in his best 14 games when he scored 92 and 87. And Lemieux, who had 40 in his 85-goal season.
That's where the similarities end. Matthews 2 seasons ago had 16 2+ goal games; his best 14 games, he had 32 goals. He finished with only 60 goals. Part of that was because he only played 73 games, but in those other 59 he only netted 28. Guys who've put up 70+ have tended to still score in those other games at a ~50 goal pace; Matthews was on 39-goal pace. This season? Matthews has 14 in his other 38 games, which is barely 30-goal pace.
Those guys also tended to score a goal in 60-65% of the games they played in. Matthews only scored a goal in 41 of the 73 games (56%) in 22-23, he only has a goal in 28 of 52 (53%) this season.
I'm not saying Matthews can't get to 70+, and I'm not about to look at his 20.x shooting percentage this season and scream REGRESSION TO THE MEAN like I'm sure some will, but I am saying the way he's going about going for 70+ goals is .... definitely different from how everyone else who netted 70+ - especially the guys who netted 76+ - went about it.