I've built three houses in the USA. I don't use conduit everywhere, but have always installed some in places where I think I might want something in the future.

I've built three houses in the USA. I don't use conduit everywhere, but have always installed some in places where I think I might want something in the future. I've never regretted it. Most useful was from my attic (not livable space) up in the trusses to my basement utility room. When I convinced a local WISP to use my roof for a back haul and access for the neighborhood it saved them (and me) from running wires all over the outside of my house and was a quick, clean install. Conduit is common in commercial work here, but almost never in residential.