Yes. I wasn't implying live views are not this, I was trying to say react, vue, angular, svelte, next.js, solid, preact, alpine.js, ember, backbone, lit, mithril, stimulus, knockout, aurelia, polymer, riot, inferno, marko, dojo have a terrible programming model and anything with server side templates is a vast improvement.
Don't know how much you have used ember, but I disagree, it's quite sane as a programming model and ember data is still ahead in terms of developper comfort for client apps.
I think they more specifically mean server side rendering of react components vs an SPA.