Successful RBR750/RBS750 firmware upgrade from OLD firmware!

I wanted to share some great news about a simple, successful upgrade from V4.6.8.2_2.1.9 to V7.2.7.15_5.1.16. Yes, that old.
I have been holding off on doing the upgrade to my Netgear Orbi RBK753S setup for a long time. Back in the day there was always a good chance that something would break doing an upgrade. Recently my wife's IPhone has been losing its connection so I decided to finally bite the bullet. I was fully prepared to do a factory reset and go from there given how old my firmware was. I decided to try the normal upgrade procedure first - seemed like there was no downside. I did the satellites first. One is wired and one is on wifi. Both upgraded seamlessly. I then did the upgrade on the Orbi. That completely worked perfectly! I had notes and screenshots of my previous configuration and everything was preserved. I don't have a super complicated setup. ~35 DHCP address reservations and 3 port forwards. The router has been up for several days and seems to be running perfectly. Good job Netgear! (Yes Furry - I have saved my configuration :-) )