An interesting article appeared recently - a lay person (in fact, I think, a non-Catholic) wore a cassock around town for a day.
He documents the experience HERE and it is well worth your time. It is super short
Contrary to what some might think, I'm not a huge fan of the cassock in one sense.
I'm pretty introverted and like "flying under the radar" in the sense of not having people notice me.
And so, quite often, it is tempting to wear "regular clothes" because I know no one will stare at me and I can walk around undetected.
But...I also know that wearing a cassock helps people know that there are actually priests around, and I think seeing a priest is a sort of "walking homily" that gets to people and maybe even forces them to think about more eternal things
This article sums up the experience quite well