I forgot I had an old OnePlus 5 (Cheeseburger) that was my primary a few years ago, but now I used to load most of my apps as a temp phone when I temporarily lost my 6T during a previous bad upgrade.
I updated it to 1.81 R OTA, cleared the password, and did another sideload leap to T with a bunch of apps installed this time. It also had TWRP not the /e/ loader.
It worked!
Every app is updating in the App Lounge. Pictures I had were still there. I’ll probably do some backing up on my primary 6T, but feeling more confident that it might just load over without issue. T was worth the wait if it is this easy to load! 
