I've always been wary of import white goods after hearing the horror stories about Samsung's and LG's, and comparing that with my experience with domestic ones where parts are cheap and largely shared across brands; then again, with most of them being owned by Maytag/Whirlpool, it's not like there are many companies either.

Incidentally, for car parts, the Big Three had a lot of parts interchangeability at the height of the automotive era, many of which are still available today in the aftermarket, but it seems that for newer models they have also started becoming more closed and proprietary.