I'm in the market for a new fridge also and am paying attention to repair records, etc. Samsung seems to have a bad rep; I've read some repair people even refuse to work on the Brand because of the difficulty in getting parts. Unfortunately there aren't many fridges that fit the width limitation of 35.5" - Samsung has them.
The article below is on extended warranties.
Most Reliable / Least Serviced Appliance Brands of 2017 -2018(Reviews / Ratings)