Is it just me, or do wigs seem less dense these days?

Honestly, the trend lately has been towards LESS DENSE wigs.

Part of this is an aesthetic thing: many medical clients dislike wigs with too much body or hair and thin them when they get them home.  Demand dictates fashion, and the manufacturers are very happy to oblige because doing so often saves them money in the process. (People are happier with the products + they save money = it's a win-win.)