Most SSD's will provide metrics that are quite readable for estimating the lifetime left for the drive. Most nvme-drive expose a line with 'Percentage used' in the nvme log (just use smartctl to read the nvme log). With sata-drives it is a bit more hit or miss, but the couple of drives I have lying around at the moment record wear leveling in Wear_Leveling_Count, which does provide the raw wear leveling count and the lifetime left as normalized VALUE.