Where we live (Kazakhstan), we had a Samsung fridge, AC and TV for about 7 years without any issues whatsoever. After moving to a new apartment, we bought another Samsung fridge and it has been quietly humming along for over 2 years now.
I never heard anybody complaining about Samsung.
Could be that US runs on 120vac and that means a lot of different parts.
Could be the US market gets more advanced compressors and what not to meet energy efficiency requirements (and maybe reduced noise) and Kazakhstan gets a simpler refrigerator that just keeps working.
Sammy/LG/GE business models aren't built on services but volume. If you buy a third party warranty service, that solves the issue somewhat, but they churn out so many models that parts become scarce.
You just got lucky or your models are from a different era. I don't want to drop money on Bosch, so I buy the cheapest ones and just replace them when needed.