“Fabric-like” isn’t the only way to create texture.

It’s just a simple fact that tile is the easiest, and pretty much only, option.

If one was a crazy-rich rich person, it would be possible to make an astro-turf sauna, but… it’s not cost-efficient.

You know what is exchangable in the sauna? Wooden buckets/scoops with plastic ones.

You can’t sit on copper in a 110C sauna because of it’s thermodynamic properties but plastic is fine. Well, depends on the plastic, but you know.