I would be interested to hear what the failure mode was for over-used tanks. Or if that is not possible, maybe the criteria people are using to decide that the tank has come to the end of its useful life.
I’ve just realised that the dashboard and printer show different life expectancies.
For my present tank:
Dashboard 39% – Layers: 29925 / 75000 Days: 44 / 250
Printer 58% – Hours printing: 347 / 600 Days: 45 / 250