Thanks everyone for sharing your help and experiences.

It's getting easier. It's almost automatic. I had to stop very quickly a couple of times this weekend, and both times I immediately remembered to unclip.

I like the feeling of being attached to the bike, especially on hills when I can use the whole leg instead of just having to push. With the whole leg engaged in the climb, there is less stress on my 52-year-old knees and climbing seems easier.

The only thing I don't like.... and I'm assuming I'll get past this just as I got past learning to shift again.... is that I have to "think" again when we go out riding. With platforms, I had more of the "throw my leg over and go" feeling. Now, I feel like I have to engage my brain more and pay more attention to unexpected events that require sudden stops. I don't like that feeling..... but I'm thinking this new brain activity will help keep me younger.