Opinion: Stop worrying about new cameras and love the one(s) you've got

I've recently found myself in the following situation: Over the course of just a couple months, the two main digital cameras I shoot with have both been replaced by new models. This includes my everyday, 'personal' camera in the Fujifilm X100F and my 'gig' camera in the Nikon D750. With the announcement of the X100V and D780, in the blink of an eye my kit suddenly went from feeling fresh to feeling like last night's leftovers. But the more I dig into the differences between these modern generati...