Sorting still costs you time and effort. Worthwhile is subjective. Sorting is also a crapshoot. Assuming you don't mind taking the time and effort, sorting is still a crapshoot. It can help some lot numbers perform noticeably better than unsorted, but it isn't going to make CCI Standard shoot like Eley Tenex. You may not even be saving any money by buying cheaper and sorting. You're essentially removing some from use. That makes the remainder that you do use more expensive again. Maybe you still use the rejects for practice or fouling in after cleaning, and not actually simply toss them, but you're still reducing the amount you have for the "now it counts" times.
Sorting by weight helps. Sorting by rim thickness helps. Sorting by rim to driveband helps. Sorting by concentricity helps. Even modifying rounds with something like Neil Waltz's die helps. How much any method helps differs from SKU to SKU and from lot number to lot number, and you just never know how much. In the end, it's pretty much always better to just buy better ammo. But, yes, it can help you get better results.