@SueJB , here's a quote from an endo which, I feel, puts things into perspective:
https://diatribe.org/issues/58/quotable-quotes
"In all the work with diabetes technology I’ve done, I’ve worn CGM for long periods of time. I don’t have diabetes, but I’ll eat a dessert and go up to 200 mg/dl. I’ll also drop down to 50 or 60 mg/dl. People with diabetes are comparing themselves to a false standard. The pancreas, for all of the advantages it has, still allows big excursions. It’s crazy to think it’s ideal.”
-Dr. Steven Russell (Massachusetts General Hospital, Boston, MA) urging people with diabetes not to be too hard on themselves.
Athough the novelty of cgm lets me play around with insulin and see more of what's happening, I managed ok for 28 years without it. Sometimes I actually get fed up with the information overload and wonder whether I'm paying too much attention to it.
Although it's nice to get a few 100% in range days, I've become much more relaxed about it going up to 9 or 10 for a few hours, because, as the doc quoted above says, that happens in non-T1s too. And why wouldn't it? That's what the bloodstream is there for, to distribute glucose around the body, so after a meal, one would expect it to be higher.
I'm ok with short periods of 9s and 10s every now and then. The thing to watch out for is regular extended 10s to 15s. That's dangerous ground.