Is it a strange indicator that this feels more like lockin to me, than loyalty? I have no idea what that means.. or how to change the conceptual impression.
My hunch would be that your subconcious is telling you loyalty towards a huge faceless corporation feels weird. If it was a local store with people you could connect your positive experience to, my guess is you'd have no issue calling it loyalty, even if that store was part of an equally big corporation.
With that said, it's hard to say if that's because i hear good things, or because it's a physical store with people i see.
Compare that to Amazon, and i rarely hear good things about their staff treatment. Despite having a good experience with Amazon. .. to be clear, i just don't hear good things.. not implying that i hear lots of bad.
This is in stark contrast to many other faceless BigCo's that I've stopped using entirely, or only use out of necessity but loathe every interaction with. (eBay, PayPal, Comcast, Verizon, etc.)