My priest, always in cassock whether in the Church, at Mass or outside. Our pastor is Polish, and he puts his cassock on I beleive during Mass and confession, otherwise he’s just in black with Roman collar.
However, I think there is a prejudice in the United States. I know several seminarians who don’t mind the cassock, but some feel a pressure not to where anything. I would donate all my clothing except for my pj’s, under clothing, and one or two changes of street clothes, and wear only cassock.
All altar boys are in cassock/surplice. No female servers.
I feel though, just from speaking with all my seminarian friends, I feel the next generation of priests (my generation) will be bringing back the cassock and habit, if not in suit and Roman collar. Its just a matter of time.
It’s such a rarity here in the US, it was shocking when I saw a priest in a cassock. Until about 4 years ago, when I was 16, I had never seen an actual priest in a cassock in my life in person. He was a Jesuit and when he said hello, I blanked and froze, I was literally in shock. I’ve never seen either in the US a nun/sister in full habit (head to toe, waist-long veil, whimple etc.). The only time I’ve seen a nun in full habit was when I was in Poland, and a priest in cassock on the street was only in Poland.