I swap toothbrush heads 4-5 times a day (a couple times per brushing session) and one of my major issues until now was that I didn't know how long I had used any individual toothbrush head and when to replace them (I didn't start using all of them at the same time). With per-head usage tracking this is much easier... I wasn't expecting it, but I'm glad Phlips is considering and supporting my use case.