Same for me. My go-to walking speed has always been brisk (typical NY pace), but I'm usually walking with my (California native) husband who has back and sciatica issues, so he often requests that I slow down. I'd much rather walk with him than without him

so I relax my gait.
As others have mentioned, these days I'm paying greater attention to uneven pavement and other fall hazards.
For the past month I've been doing 5-day-a-week, 30 minutes per day, online (at home) classes for balance, stretching and strengthening. Standing rater than sitting or being on the floor. I'm noticing a difference in my balance, flexibility and strength.