Hi, I bought a pair of Vaporflys in 2019/2020 (can’t remember when exactly). Since then I have worn them very sporadically. One half, one Marathon, a couple of 5ks. My understanding is that these type of shoes have a limited shelf life in terms of performance benefit, but I alway see it expressed in mileage (i.e over a certain mileage the performance benefit decreases). My question is, does anyone know if there is a time period over which the show’s performance benefit decreases independent of how much milage is done in the shoe (e.g. would a minimally worn 5 year old pair of Vaporflys retain their performance advantage or would their age count against them)? Thanks.