Yeah right that's why the skin came off the Aloha Airlines plane because aluminum handles stretching so well. Aluminum work hardens as bad as any 300 stainless.stainless fatigues where aluminum can handle the stretching from the pressure going up and down better.
Actually I run 2 canners for 14 quarts a load and can turn them around in half the time of your 941 which gives me 28 quarts processed in the time it takes you to process 20. Heating up all that mass uses much more fuel than my prestos and the 12 qt mirro which also handles 7 quarts, but really destroys the rhythm of the canning process. Your all americans will last a lifetime provided nothing ever gouges the sealing surface then you better have a spare top or bottom or know how to heliarc and polish. Your canner is cast not forged, not that it makes much difference though castings are somewhat brittle by nature. The presto is forged as deep draw pressing is a cold forging process resulting in a stronger product.The entire canner has to heat up, even the lid has to be up to heat and I don't think stainless would work since it heats so unevenly and almost refuses to conduct heat. Most stainless pressure cookers are small and still have an aluminum bottom in them to conduct the heat better.
If there is an $80 canner out there that is as good as any All American canner, I'd be the first to buy one. I own 4 different canners and have used many different ones, I can tell you exactly and objectively what the differences are. To me it all depends on what you want, how much money you have and how much you will be canning.
If you want a canner to can 7 quarts per load and aren't going to can much, I really don't know why you would buy an All American canner. But if you want top of the line and plan to go through many quarts per year, you won't find a better one for the money.
I paid $200 for my 941 All American canner, not $400. It does 20 quarts per load but the fact that it never needs a gasket, is made of forged aluminum and is twice as thick as a Presto are just bonuses to me. Considering the fact that they will last a lifetime with no maintenance, I think a 930 (holds 14 quart jars per load) is a good investment for $280 (shipped) if you want the best. I don't know why you would spend $200 on an All American 921 when you could go $80 more for a 930 and get double the capacity or $120 less for a Presto and get the same capacity.... Yes they are made better and are gasketless, but not worth $120 more for the same capacity IMO.
Buyer's remorse is a terrible thing. I was reading around the web, Presto is really a scumbag company. Makes great canners though.I just bought mine off walmart.com... It's a 23 quart presto..
I was reading reviews and I found that the presto is the most "passed down" pressure canner/cookers because it lasts! I paid about $90 for it but it'll last a long time.