Wade, I have just changed doctors over this issue. This has been a very difficult decision for me because I have been with the same doctor for almost 20 years, and he has a reputation as one of the best diabetologists at a leading hospital in St. Louis. But their office is organized almost exclusively around Medtronic and I had so much difficulty w that cgm that I stopped using it. Still, I was pressured to stay with medtronic supplies.
I just moved to a diabetes group that offers a variety of pumps and cgms, where I was able to inspect and compare products, and consult the diabetes educator sitting beside me, who is well versed in all the leading gadgetry. You said so well that you just couldn't get past Medtronic looking like 1980's. That is how I am seeing my old doctor's office compared to the new.
The difference between Medtronic cgm and Dexcom is night and day. I haven't decided definitely on the t-slim, may wait until it communicates with the cgm, but when I decide to leave Medtronic's pump, the t-slim will be the one I change to.
Good luck with your decisions. And thank you so much for your post.