At what point is max. strength improvement not neccesary?

[system]

@Track_man

this belief is true in moderation only. increasing your squat from 275 for reps up to 365 for reps is going to benefit you, and even more benefit if you’re squatting 405, 455, so on.

Not necessarily. Again, plenty of people have had the improvements you mentioned here in this post and even greater with only minor improvements in their sprinting abilities.