Yeah I'm not sure what information this really protects assuming you're only communicating over encrypted channels (https) already.

In theory it could protect location data from the carrier for locating you with a wild amount of opsec practice but I highly doubt you could pull that off for a daily driver.

Having wifi/bluetooth off in public isn't a terrible idea though as those are generally much easier attack surfaces and are leakier.

It is the same general location about half a mile from home where I flip over. This is to ensure location from cell tower triangulation does not identify my home and therefore me.

It’s all about your threat model.

Suppose you wanted to find someone that aways turned on their phone on at ~8:15 AM and found someone that always turned their phone off at ~8:10 AM within 15 miles. How difficult would you say it was to make this connection?

Nobody is looking for me. I don't have any regular commute either. I just make sure not to use cellular at my house since that would narrow the owner of the SIM down to one of the people living in this house.

Do you own a car with OnStar or SeriusXm ?

I have O*. How do I disable it?

No. I ride a bike.