Bill, sorry I was a bit confusing in the wording. My point was it
isn't suffering from glaring issues, other than PK/MK swap and clogging as mentioned.

By "not suffering" I meant not suffering in sales or other pressures that would conceivably force Epson to change quickly. I'm sure the printer will be upgraded but it will be in Epson's own good time based on their development roadmap -- whenever that is. I don't perceive anything that indicates it's imminent, but who knows... it could be next week.
The 4880 is the dominant heavy duty 17" desktop unit; an easy statement to make since it's one of only 2 such models. Its only direct competitor from another company, the Canon iPF5xxx, probably hasn't put much fear into Epson yet at this point. The only other competitor is the 38xx, and I'm sure Epson is equally happy to sell it too, because they likely make most of their printer business unit profit on ink, paper and service contracts anyway.
If you don't ever use roll paper, there's not much reason to look at the 4880 over the 3880. The 4880 probably could maintain a heavier printing duty cycle and perhaps may have a few more job control features, I don't know for sure. But for light to medium load the 3880 would be a good workhorse... and it truly has no direct competition from anyone.
I don't know that "AccuPhoto" is much to get concerned about, whichever version of it. I think it's just a fancy marketing name for "our printers make nice looking prints."

Re: clogging, there have been some advances with the xx80 and x900 Epson models, but if your environment & printing load is such that clogging is a major problem now, there is a good chance it will still be a problem later. In this range of printer, Epson does not have any anti-clogging technology similar to what Canon or HP have done. That will be a major innovation for Epson, whenever they get around to it.