Not a question, but a resolution that I thought I would put out for future reference.

2014 Q60S AWD.

Problem, Code P0101 -Bank 1 MAF out of range- and limp mode / CEL

Troubleshooting: clean / replace MAF sensor. Would correct issue for a while then come back.
Started monitoring the intake air Cubic Feet Per Minute (CFM) and noticed Bank 1 would slowly creep higher than Bank 2 and MAF voltage would correlate with the CFM split.
Schooled myself on bridge circuits, MAFs, etc. Decided that there must be a voltage problem that could be caused by wiring or connectors.
Verified wiring / connector problem by noticing that repositioning the wire harness would change the CFM on Bank 1. (This is why changing and cleaning the MAF was fixing it for a period of time as it moved the wires when the sensor was removed.)
Dare I say how long this had been going on : (

Solution: Replaced Bank 1 connector with a connector / pigtail from Amazon.

Result: Bank 1 is 100% in range according to the FSM voltage tables.

Bad news: Bank 2 is now higher than Bank 1. So now I will be replacing that connector tomorrow.

Just for those curious, I chose to log CFM as it was much more sensitive to fluctuations and changes. Thus, I could predict the point that it would go into limp mode much more accurately than with just watching the MAF voltage.

Hopefully this helps someone at some point.