Technically this theory is correct but realistically, re-manufacturing very obsolete computer parts would be difficult. The majority of technology is driven by the same force that drives pretty much everything in the modern world - money. No modern company is going to be interested in making parts for older machines if there is going to be no profit made from it - they're only interested in themselves. However, fortunately we will always have enthusiasts who have enough drive to keep these machines alive and help their fellow enthusiasts by supplying replacement parts for little or no financial profit.
So yes, it would technically be possible to produce components for 20+ year old compact Macs if someone or a group of people possessed the right equipment, knowhow and were interested in preservation rather than personal financial gain.
An interesting expample of this is vintage cars. In recent years, certainly in the UK, a few vintage vehicle clubs have started producing replacement parts for cars from the 1920's and 1930's. These parts are made in the traditional way and are sold to make a small profit for the club but primarily to help the members to keep their cars running. Some have gone as far as improving on the original design of a part by using a different material for example. Many good, original replacement parts have vanished so vintage car enthusiasts are going to be relying on these modern parts more and more. I reckon that this is how it will happen with vintage computers too in the future. Who knows, perhaps even the 68KMLA will have people producing 68000 processors or 30 pin SIMMs for their fellow Mac enthusiasts.
So yes, it would technically be possible to produce components for 20+ year old compact Macs if someone or a group of people possessed the right equipment, knowhow and were interested in preservation rather than personal financial gain.
An interesting expample of this is vintage cars. In recent years, certainly in the UK, a few vintage vehicle clubs have started producing replacement parts for cars from the 1920's and 1930's. These parts are made in the traditional way and are sold to make a small profit for the club but primarily to help the members to keep their cars running. Some have gone as far as improving on the original design of a part by using a different material for example. Many good, original replacement parts have vanished so vintage car enthusiasts are going to be relying on these modern parts more and more. I reckon that this is how it will happen with vintage computers too in the future. Who knows, perhaps even the 68KMLA will have people producing 68000 processors or 30 pin SIMMs for their fellow Mac enthusiasts.