Uniden does not "owe" us a firmware update. While some updates corrected certain operational aspects of the scanner, there is no implied requirement that new features be added to scanners already sold. You see the same thing in the automobile industry. Unless the change is a safety related recall, none of the manufacturers will ask you to come in so that they can give you a feature found on newer models.
I think many people got somewhat spoiled when UPMan was still around, and in reasonably good health. He was much more active on discussion forums than I've seen from representatives from other product lines. While Paul was not the only person at Uniden that dealt with scanners, he was the driving source that pushed for updates that corrected specific issues. He also was the "idea man" both for improvements on a brand new model, as well as adding some features to previous models, such as adding DMR & NXDN capability. One thing that, unfortunately, we may not see is a release to use the extra ports on the SDS series scanners, like the micro-USB port above the power/data mini-USB on the SDS100. Nothing specific was mentioned as to what they might be used for, so no guarantee that is in the works. I hope I'm wrong, but there was not anything specific announced.