Ponta Delgada to Boston is roughly the same distance as Boston to Las Vegas. I can understand if you're a business class passenger not being into a single aisle plane (I am guessing most carriers using them to/from Europe don't have special configurations for their business class). But for most people I don't see a big difference between flying a 752 to Europe in coach vs. flying a 763/333/332/772 to Europe in coach.
Someone had posted a photo of their premium cabin on instagram with the caption "just walked out of 2017 and into 1985 on a jetbridge."
That's true. Transcon (and LV is essentially transcon) is about as far as I like to go in Narrowbody coach. I'd rather fly Boston to Tokyo in coach on the 787 than Boston to San Francisco on a 737. It's not so much the seats as it is the easy of access to bathrooms and the ability to stand up and move a little bit. I'm mostly in economy, but the wide bodies are more comfortable when you start getting up there in terms of duration. I'd say this route is borderline.