Aside from this never having worked, and being, so far as we can all tell, incompatible with the level of fine-tuning to everything from the backend to the pixel positions of the UI that people want, there are very serious problems with the business model (or absence thereof)
Some telling snippets from the article:
"Everything you build on Dry.io right now is stuck there."
“Later on, we’re going to be making on-premise stuff, so if you want to run it on a local server or something like that,” Cassimatis promises. “But for now, yeah, stuck on our platform.”
"Dry.io also has no business model, yet."