True, though expected service life of these devices is much shorter than, perhaps, TDPRI posters expect for amplifiers. In the ISS, Lunar and Mars rovers, etc., the service life is measured in days or months. The Mars rovers were built with a specified 90 day service life but lasted much longer. Many of the parts on the ISS (solar panels, computers, even toilets, and so on) have been replaced. Truly, the ISS is approaching the old USAF definition of an aircraft - a collection of spare parts flying in close formation. Hospital equipment (monitors, pumps, ventilators, and lots of computers) also have defined service life, often tied to service contracts, usually measured in say, 2-5 years. I am most familiar with endoscopy equipment and that had a service life of ~3 years on average, with relatively frequent repairs. The OP was prompted, I think, by the thread asking about the expected life and repairability of Tonemaster amps, which is not known. If there are service life specs or estimates, these have not been released by Fender. As for repairability, my experience with SS amps, computer cards and motherboards, etc, is that replacement boards and cards is the norm, not repair of SMD assemblies. And, those replacement boards and cards usually are only manufactured for a short time, defined as less than a decade. I have kept some old school Macs from the 80s and PowerPC machines going for longer than that but eventually, even the spare parts, if you can get them, suffer from capacitor swelling, other SMD failure, and even corrosion of the traces. And, as noted above, the replacement surface mount component, like ICs, may not be available even if you want to tackle desoldering and soldering components on an aged circuit board.