We want Ornitishian dinosaurs, too.
The original article is actually promoting inventing new animals that look like dinosaurs. Or rather what we guess they looked like. We might be able to do that, someday.
Anything that looks like a sauropod would need solutions for all the problems anything sauropod-shaped would necessarily have had, and solved. There is no reason to think our solutions would match what they had, but we could anyway determine whether they were plausible solutions. My bet is on two-chambered auxiliary hearts all the way up the neck. (The null hypothesis is a volkswagen-sized heart and very, very thick artery walls, assuming new circulatory structures were out of reach.)
The vw sized heart was in a dinosaur show when I was a kid. Either David Norman or Bob Baker stood below a brachiosaur and told the audience about the heart. wow 30 years. Time flies.
For those in the back, sauropods, despite appearances, run with the tyrannosaurs and birds, not the triceratopses and hadrosaurs. Or anyway walk. Or did.
My solution to their energy problem is eusociality: big Mama stays put and is fed by the small fry who range far and wide. They also tend her eggs. She eats their first-level output, then they eat her better-digested leavings. The digestion scheme is like rabbits, and addresses the problem that absorbing nutrients through a 2D intestinal wall scales badly to a 3D animal. If she doesn't need to heave her bulk around the forest, her energy needs are lessened. Meanwhile, the small fry don't need to digest everything all the way.
The small fry are no bigger than elephants.