We know that staffing issues are affecting a large number of business organizations. Whether it's a restaurant that is only open limited hours due to lack of workers, or a service organization that has a backlog of repairs without personnel to pick up the slack. During the height of the pandemic, we saw lengthening turn-around times for Uniden repairs. Based on recent comments on return times, apparently, that has improved. What we don't know is how thorough the repair techs are at looking for additional issues that need to be addressed.
In budd's case, the second failure apparently occurred after the OEM warranty expired, & presumably after the 90 day "repair warranty" period. That may have been the case with the OP's scanner as well. In both those cases, it appears that the repair techs did not do a thorough & complete repair in addressing the (by then) known cold solder joint issues. That does not speak well for their repair process. I would have preferred to see Uniden do a 'repair campaign', as was in place for the RTC and display problems for the x36HP scanners. But that has not happened for the solder joint issues of the SDS100 nor the hum of earlier production SDS200s.. Whether things might have been different had the late UPMan survived his terrible battles with cancer is something that we'll never know.
However, the cold hard fact is that, eventually, warranties do expire. Not that it makes any of us happy if it's our equipment, but manufacturers are reluctant to approve exceptions for the repair of out of warranty items. The computer services firm I worked for before retirement often had incidents along that line. A customer had an item, such as a PC, laptop, or printer, that failed near the end of the warranty. Say, the failure occurred at the end of the week, but by the time a service call was generated & a tech was dispatched, it may be that the warranty expired during the weekend before the service call. In such cases, the manufacturer would often grant an exception so that a claim could be filed & the item repaired. But as that time frame between end of warranty & the claim filing extended, to a few weeks or even a month, at some point a line had to be drawn. Otherwise, the warranties, in effect, would never expire. That was a precedent none of the equipment manufacturers wanted to establish.
While this may not apply to either budd, nor the OP, if you have a scanner, or any other item, that failed just past the end of the OEM warranty, check how you purchased it. Many credit cards have a feature that extends the original warranty, often by a year or more. If the card you used for the original purchase has that feature, exercise your rights & pursue that solution.