Hardly a new trend...
Most gunsmith fit barrels will come without a proper finish reamed chamber by default, and the smith can set it to whatever they want. The only exception I know of is for AET barrels, which for other reasons as well I am not a fan of.
For those that do finish ream on complete guns you are probably right and they don't replace their reamers as often as they should, if reamers are used at all.