I've been climbing off and on for about 3 years now, but only started going regularly in the last 6 months. I've had the same pair of shoes for about 2 years now. My brother recently pointed out that the toes of my shoes are starting to get seriously worn down. The seams haven't popped yet, but there is a noticeable lack of a clean edge to my shoes compared to a new pair. I feel like this may be affecting my climbing ability, but I have no real way to tell without buying another pair of shoes, going through the process of breaking them in, comparing how I climb in each, and that takes a good bit of time and money.
Is there any way to definitively tell when it's time to replace a pair of shoes that aren't obviously completely destroyed already?