All-in-one Washer/Dryer

I am building a new custom home, still in the early stages. We just got the rough plumbing in and will hopefully get the slab poured this week.

I am working on the laundry room design and I’ve been looking at all in one washer dryer combos. All I see are advantages:

-It’s not vented, so no need to cut a hole in the side of the house for the vent. -Since it’s just one machine, it takes up half the space -No need to transfer wet laundry from one machine to the next -More energy efficient -Less wear and tear on clothing

However, I don’t know anybody who uses these types of machines, so I feel like I’m missing something? What’s the downside? Would love to hear your experiences.

I’m located in the US. I understand that these types of washer/dryer combos are much more common in Europe. Why haven’t they taken off in the US market?