I realize I don't understand much of the life of someone so strong, but how do you wear out a 40+ kg kettlebell often enough to have a thought-out replacement plan?
I assume the new round would be of heavier kettlebells as OP continues to develop strength? If not, I’d also be interested in knowing how one wears out kettlebells!
For posterity, several days late, upgrading to larger bells or getting a second 40kg to do exercises with a 40 in each hand (double kettlebell). If I ever wear one out, I'll be shocked.