Perhaps you thought that the time for pantsuits is over. You'd be wrong.
The time for pantsuits is just beginning.
The term has been around since the 1860s, but back then it only referenced suits worn by young men.
The reason they were called pantsuits rather than just normal "suits" had to do with the fact that the pantsuits came with short pants for boys. Real suits came with long pants.
Up until the mid 20th century, it would be a big deal for a boy to get his first pair of long pants. You'd usually receive them around 13, when a young man might be old enough to not outgrow them immediately.
So, the term "pant-suit" in the 1860s was largely simply to indicate that someone who was not a full grown man would be wearing a suit.
Which perhaps made the public realize that people who were not men could wear suits. People like women.