As you read guide book, you often saw first ascent and after first free ascent. It was normal before that people aid climb a route and that after sone other team free it. As they do a route bottom up, when they aid, it is mostly that the movement was over the limit of the climber.
As the weather was colder, people like to aid climb a route and found himself in a micro climat in t-shirt whit snow around them.
As a trad climber, and as the weather is colder to free climb a trad route, did you have a season for aid climbing?