No one is advocating shooting magnum loads in the 696.
According to Pearce, S&W tested the daylights out of the gun and it is as strong as any 44 special needs to be and then some.
If there were more than one or 2 cracked forcing cones ala some .357's we would have heard about it.
Obviously shooting 35-36 KPSI in what amounts to the same gun required a lot of re-engineering and that they did with the 69.
I seriously doubt the 396 frame is as strong as the 696 just from the weight.
I could be wrong about that but the recoil limits what you can do with it anyway.
They once limited loads in the 396 to 200 grains and printed a warning to that effect on the barrel but gave that up on later versions.
Aluminum, even alloyed well, will crack before most good steel will, even stainless.
I do like the 2 piece barrel and my 396-1 shoots almost as well as my 696-1 which may be my most accurate revolver
along with the Redhawk and Dan Wesson 7445 (which has a 2 piece barrel).
Bottom line is the 696's are not falling apart shooting standard loads some 20 years after they were made.
Maybe they don't get shot a lot due to their scarcity.
I know I shoot mine almost every other time I hit the range and have developed about a dozen loads for it from mild 650 fps numbers
to 900+ fps using N105 which is the absolute most productive powder (available around here) for the 44 special while maintaining normal pressure.
If I ever crack a cone I'll Shirley let everyone know.

S&W as well.
The demand for the 696 certainly hasn't gone away over the years as a result of those cone concerns, real or imagined.
Didn't mean to ramble, denigrate or insult anyone but I keep hearing that concern every so often and I personally just don't believe it.