hey there Mr TT, like you I have an old set of MSR stainless steel pots, and I too wanted to reduce weight, so ended up finding a used aluminium pot and if need be, also use the smaller aluminum pot that came with a Trangia Mini kit I got a bunch of years ago. I don't recall how much weight was saved in grams, but between using an alu pot and then when I got a titanium mug (about 800ml) it did save probably what cycoo say, about a pound.
Even when traveling with my wife in Europe, we tend to hit a grocery store at end of day and go with easy prepared foods, especially in hot weather, so generally use the stove for boiling water for coffee or soup, but the alu pot can still heat up basic meals.

For me, it was worth the weight saving, but I'm okay with simple meals.
When alone, using the titanium "tea pot/large mug/small pot" (I think of it as all three, its a bit too small, but useful for a minimum setup) with the trangia nestled inside, makes for a much more compact setup that I like when not using panniers in bikepacking mode.

oh--should add that alcohol fuel does tend to take up more room/weight for a given heat output, plus a trangia is slower, plus often when you have to buy more alcohol, you end up carrying more than you need due to the bottle size, so weight there....

You might be able to find some used alum pots and see how they compare to your stainless steel setup, I'm sure they are inexpensive, even if new.