Worst case, if the experts are right, it will sound no different over time. On the other hand, you might find the sound gets better with time.+1
This is my philosophy with regard to leaving my Yggdrasil on 24/7 (which I do not) and its break in period (I left it on continuous for the first week).
.....Seems I may be making a big deal out of nothing and should just use the manufacturer trial periods as intended for our decision....Sounds/reads like a very good plan. Just be mindful in cases where a manufacturer (or owner/user) recommends leaving a component on 24/7 to draw a distinction between "break-in" and "breaking".