Well I was a "pleat & cuff" guy for over 25 years, but that ship has now officially sailed. This past week I took 100% of the pleated/cuffed trousers and got rid of them. I replaced everything with non-cuffed pants across the board, which is something I started with my golf gear last year.
While I'm still not the "skinny jeans type" like Devin, the styles today simply don't lend themselves to looking good with the pleat/cuff combo. And BTW, you cannot wear cuffs with flat fronted trousers. It's just not done.
As for the side slits.... If you buy trousers you can go to any good tailor and have a 1.5" slit put in for small fees. I do this for a fair amount of my golf pants.