I splurged on a couple nights at Deetjen’s Inn in Big Sur and slept on linen sheets for the first time - they’re lovely. I think they may iron theirs.
After a few years I bought a set for myself - they start off somewhat stiff and need several washings to get to a comfortable softness, but there’s something about the breathability and texture that you just can’t get in cotton. It feels like a special treat to sleep in them.
As much as I love them, I’m not sure I’d buy them for my guest beds. My guest sheets almost always have to be replaced due to stains, not wear from use/washing. The 100% cotton sheets and duvets clean up well and aren’t too expensive to replace when stained. Replacing my cotton bedding is a reasonable cost of doing business, but I’d have a hard time affording to do the same with linen. And asking guests to fork over $200-300 for a stained duvet would feel unreasonable.