Thank you for this! Your answer was very helpful. Yeah, the OnePlus Pad 3 looks quite flexible. The Snapdragon Elite is a powerhouse, so you can get a lot done with it. And if the O+ Connect remote software is even half as good as they're saying, I think this is about as close to iPad/"Apple ecosystem integration" as you can get on Android. I do own an MBP and an iMac, as well as some Linux boxes, but I don't have high expectations there (i.e., these days I use KDE Connect, remote desktop software, and occasionally Parsec, so I'm not looking for full “Apple-level” interconnectivity).
How's your OnePlus for reading and gaming in bed or on the couch (assuming you do this at all)? Do you feel any fatigue from holding the tablet? And was it any different with smaller tablets?