Jeans won’t go away, but skinny ones will. No trend lasts for ever. Fashion is the industry with the biggest obsolescence. It relies on it to sell stuff.
Everything goes in cycles. And you always get a reaction to a previous trend.
Somethings are mega trends, and they last a long time. This is what skinnies are.
As I’m old, l remember flared being vilified all through the 80’s. But they reappeared about 20 years after the 70’s, and stayed in fashion for about 15 years. Skinnies were unheard of then, everyone wore bootleg/kickflares. And they will be unheard of again.
I think on the trend curve they have passed the top of the curve and are on the decline. I’ve indicated on the photo where l think they are.
Nothing in fashion is static ever. I don’t wear skinnies anymore as l feel wrong in them. And I’m old!!! But my gut reaction ( and l used to do this as a job) is they are past their prime.
Even if they become ‘classic’ they will change. And it’s rare for an extreme style ( which skinnies are) to be a classic.
I don’t know what will replace them though. Flared are back, girlfriend, boyfriend...,,, skinnies were designed to be worn with large oversized tops to balance the silhouette. These are still around but look newer when cropped and work with baggier jeans.