I'm not sure it is called the same thing, but it was comon on MTBs in the 80's? Nishiki did a lot of them. They have the advantage for certain bikes to allow stays (top or bottom) to be unlimited in length. They also look easier to fit it reducing the fit to a bunch of end on butts, that can be cut on a mill or straight from a miter program, or are square. Something like th Strawberry casting does look heavy to me, but I have not handled one.

As far as reducing the difficulty of making the joint at the seat, you can use Bontraged stays which are a slip fit (5/8" .058" wall over 1/2") (allows the stay to extend like an antenna) to allow you to work up to either end without cutting the stay too short. And if your design does not allow those stays, you can still use the basic idea to make a pattern. A bit of a a round about, but easy on the nerves the first few times out.