Yup, we've had an LG washer dryer pair for ~10 years, and the dryer has needed no maintenance at all, whereas the washer has only needed fixes to the relay board. So one repair on the washer and none on the dryer for ~10 years, that's pretty decent!
We'll be replacing it soon because the relay board is acting up again and it's not worth the $150 or so and an hour of time to fix it again since something else is likely to break soonish (probably the pump motor of I had to guess).
I've heard horror stories about Samsung and some other brands, so I think we did well.
Depends on the appliance. For example, LG dishwashers have good track records.
Different manufacturers excel at making different things. Don’t shop by brand, that’s how you get stuck with a lemon. Read the product reviews and expect different brands to be better at different things.
I leave the door on it open between washing cycles.
It's a non-iot device that I can program to start the wash cycle at specific times, E.g. Load it in the evening but start at 4am so it's ready by 7am. Yes, cycles are long but it's super efficient with both electricity and water use. It's also very quiet even during spin.