As Spdguns mentioned , this isn't new , it's been around a looong time . I might even had still had some hair .
To be generous , it might be useful for certain very specific situiations , but as a general approach , not so much .
Weaver isn't " dead " , nor not viable .
Back in the day , when Weaver was dominant , I was outspoken about the merits of properly done Isosceles . Isosceles is my default stance to teach .
But * for me * , in rapid shooting , I get more precise hits at same speed with the Chapman subvariant of the Weaver .