I love my single speed. It’s freeing.
My commute is about 22-24km each way but there isn’t much elevation.
Low maintenance, low cognitive load (no shifting whatsoever). It’s also less likely to be stolen as it’s lower value.
Checks all the boxes for me.
I use it for commutes, easy rides with kids, and rides with wifey. Mine is more hybrid in its geometry but i changed the bar to drop bars and the stem is a bit longer than stock so im way more aggrressive on it.