But not recession proof. Also, the "automation" can happen gradually without making it look like it's affecting the trades. Thinking about plumbing, in my local

But not recession proof. Also, the "automation" can happen gradually without making it look like it's affecting the trades. Thinking about plumbing, in my locale they've gone from sweated copper and iron drain piping, to plastic tubing that comes on a roll and is joined with some sort of tool that squeezes the fittings onto the tubing. Drain work is all PVC glued together. So the skilled labor content of plumbing a house has decreased over the years. Every house in my neighborhood has hardwood floors throughout -- it was cheap when the subdivision was built out, but laborious to install. Today, the same class of house would have carpeting or sheet flooring, costing a lot less to install. Other things like vinyl siding, Romex instead of hard conduit, etc.