Why not both? The JWST contains entirely different class of equipment, none of the likes has been included before. It also includes some of the largest equipme

Why not both? The JWST contains entirely different class of equipment, none of the likes has been included before. It also includes some of the largest equipment, huge mirrors that are capable of capturing huge quantities of light. Because of the frequency it is planning on looking at (enabled by how cold they're making the instruments), and because of the size of the mirrors (more light from dim sources), the JWST is going to be able to see waayyyy further, more dim, more old objects than any other telescope before. This is why the JWST is so exciting at all. It's going to tell us a LOT about the early history of the Universe. The JWST is not about putting the iPhone 13 in space when we already have an iPhone 12. It's more akin to putting an X-Ray camera on the iPhone. Actually, "that telescope but more," projects are few and far between these days: most agencies aren't interested in doing "the same but a little more,"--most projects optimize for where the biggest difference can be made in science. As an aside, you downplay the importance of angular resolution. If we're talking about visible light, having a space telescope take a picture of a galaxy in the visible spectra is obviously different and more useful than your phone/eye capture the "same" photons. Extra resolution is always enlighting because it provides us more information. Maybe that single point of light is actually not a single point of light, for example.