Fashion trends are highly accelerated these days. 3 years ago it was gauche to wear XLs - the cool kids wore tight fitting size M t-shirts. Fitted t-shirts are now for washed-up 30-something web designers. Cool kids are back to size XL. I never thought I'd see the day when 1990s Theodore Huxtable / Dwayne Wayne outfits became cool again. Ugh.

However, since linux users are largely oblivious to the fashion world, I'm attributing this particular trend to weight gain.

Or older. Like most people, as Linux users age, they're likely getting fatter.