My $0.02;
The risky area of an aluminum frame is its surrounding material of a weld. The weld can be the strongest & the areas far away from the weld are likely to be almost as strong. The weaker areas is the nearby material to the conducted weld. The heat during the welding stresses the aluminum that is not fed the filler rod & shielded by the inert gas.
As long as everything was done as it should have been, as well as necessary QA checking, an aluminum frame should outlast its responsible owner.