With season on pause, we could count OV goals after 1200 so far, ages 36-39.Looked at Matthews goals scoring, he slowed down a bit this season scoring 20 in 40.
Auston recently played his 600s game, age 19-27, scored nice 388 goals.
For comparison OV in his first 600 games, age 20-27, scored 371 goals.
In his next 600 games OV added 363 more goals, we will see how Auston ages.
Note that in both OV 600 games periods scoring levels were lower than they are now.
For more comparison McDavid is closing on 700 games, 694 to be exact, scored 357 goals.
He added 145 goals in next 265 games (a bit lower pace of 328/600, mostly due to first half of last year slump, likely playing injured). These games over 1200, late thirties, are probably hardest to match for potential record challengers, even in higher scoring environments. Lots of luck, durability and motivation needed, besides ability to reinvent, like previous posters mentioned.