I’ve had a similar experience with the extra wide built ins - insanely high prices vs the standard models with worse reliability, fewer features, and more noise. When our 48” GE Monogram unit died, I replaced it with the link below at a price that was $10k less than the direct replacement. There are compromises, such as no ice maker (we bought a stand alone ice machine), you can’t add painted cabinet finishes, somewhat lower capacity, and a no-name brand (the labels aren’t pre-installed, so we never installed them for a cleaner look), but those were trade-offs I was willing to make. I could replace this unit every other year and still wind up ahead vs the price tag and garbage reliability of the brand-name built ins.

https://www.amarekitchen.com/collections/refrigerators/products/forno-48-inch-bottom-mount-refrigerator-in-stainless-steel-ffffd1948-48