Also just to give a sense of perspective: the graph I keep posting is the manufacturer's data sheet scaled by a factor of ten. In an apples-to-apples comparison, you can see where the blue line, the manufacturer's simulation, dies at 1000 hours; how the Sensor Watch with November 2021 firmware outlasts it to run for over a year; and how the February 2022 firmware outlasts even that test. With improved crystal and cap selection, the new hardware revision could outlast even this one. Wild stuff!