We have custom panel fronts for our fridge and dishwasher. When we bought the house 25+ years ago there was already a Sub Zero, which died while we were working on redoing the cabinets – but keeping the same footprint. I really love the look.
I’ve found we need to replace microwaves more often than any other kitchen appliance, and sizes tend to change. We replaced the built-in with a cabinet that has a lift up hinge. Also did the same thing with the toaster/tea kettle cabinet. I’m a fan of very little kitchen counter clutter.