the loss of the hyphen in words using non makes me sigh.

The non- in nonagenarian is a whole nother non-.

The hyphen can be an ephemeral thang that has its moment in the sun and evaporates as the mist before the hot afternoon sun. Between base ball and baseball, and co-existing with both for a while we had base-ball.

The lost hyphen I've always mourned (but I'm getting over it as time goes on) is the one in coworker. Always looks like somebody who orks cows without it.