Not sure if you live in Maryland or you work for Verizon. But I have had the same 4.8 for a while and I still unplug and plug in several times a day to watch tv. I even called Verizon cyber solutions team and they told me an update was coming in the next month. Not sure where you get your information from, but would like to see what source you derived your 4.8 as the newest update and fix the Sony 4k tv and VMS1100 STB issue. I attached a picture of my STB setting as of Feb 23 2018 and the issue still persits. Why would it have APR in the update if the update was recently pushed out to Maryland as you say. Please post a valid source for your information so I can call Verizon and see what they have to say.
I did find this thread http://www.dslreports.com/forum/r31731263-Quantum-APR-4-8-Update-12-22-17 but not sure how accurate it is since its not a Verizon Team Member posting it. Not sure where this person got his information from they are stating a 4.8.1 release.