[scholia]

Laptops outsell desktops by roughly 1.5 to 1. Although sales are still in decline, around 113 million desktop PCs were sold in 2015. Most of those probably went into businesses.

Roughly 700 million desktop PCs have been sold over the past 5 years, and probably a large proportion of those are still in use.

They work faster, they are easier to repair and upgrade, they are cheaper to run, and they are far better ergonomically (1).

Companies like laptops if they can avoid giving users fixed desks. (Hotdesking more staff across fewer desks reduces costs.) If they're using laptops on fixed, personal desks then they are not very smart.

(1) Ergonomic problems with laptops can be reduced by providing risers and external keyboards, and sometimes by adding external monitors. These are extra costs.