I'm pretty close to OP's age, so pretty much within what most people would called middle aged (if lucky). Sometimes I do feel like time is sort of running out,

I'm pretty close to OP's age, so pretty much within what most people would called middle aged (if lucky). Sometimes I do feel like time is sort of running out, not in a dramatic mid life crisis sense, but as a realization that time's going by pretty fast now. Seeing the potential remaining time visualized like this refreshes my perspective on this a bit, and that there's still time to complete some tasks on the life bucket list.