Usually its those plastic water lines. Stainless braided water line is the way to go. Better than copper with compression fittings and less kinking issues also.Another thing is it's not so much where it was made, as it is quality and type of parts used. Compressor motors today are cheap. And ice makers that used to be plumbed with flared copper tubing, now are all piped with snap together plastic tubing and fittings.... As are most under sink R.O. systems.
Leaking ice makers are one of the leading causes of water damage in homes today. I personally know 2 people who had their floors destroyed by ice makers that failed..... But you're buying a freezer, so at least you are safe there.
Especially on city water with higher water pressures.
And more friendly to pulling out the fridge regularly to clean.