I believe Moore's Law (after needed change) can be applied to anything that is actively used and developed - eg. price of space launches per kg halves every ~10 years, amount of qubits doubles ~6 years
Producing products that can last decades but for which time of exponentiation is <5 years doesn't make too much sense - extreme cases are our current CPU's (heck, my brother has P4 3GHz inside his box, and my laptop has T3400 (2 core), from which 1 core has computational capability of his entire P4, while entire CPU (on 100% load) takes 4-5 times less energy than P4) were [total] computational capability is doubling every ~2 years, making it rather meaningless to produce systems that can last decades.