Laying tiles without rails

In the past (TM), edges were also made with Jolly. And even earlier, there were tiles where the glaze was wrapped around the corner for use on corners and edges. That looked really good.

I think I have to ask for clarification on what exactly is meant by "Leiste" here? Aluminum/stainless steel profiles or what?

On a cut baseboard, you apply acrylic and paint it as well.

However, there are also ready-made baseboards available from branded tiles. These are rounded at the top edge and ideally continue the décor on the curve. I would always recommend this, provided a tiled baseboard is desired. (especially with wood-look tiles, I find that hideous)
They do cost a few euros, but you save the tiler's work of sawing up the floor tiles. Depending on the format, that can be a very uneconomical matter.

I think the point is that edges protruding into the room (e.g. stud wall, window reveal, shower wall) are also not supposed to be fitted with moldings, right?

I'm also not a fan of moldings and would have preferred to avoid them. But our tiler advised against it. 1. Sensitivity, 2. The edges have to be cut and positioned very precisely for it to look perfect. He also said it could look "cheap."

I had hoped for a Jolly molding in a matching color, but unfortunately, they didn’t have it. So we had to take stainless steel. But I have to say it bothers me much less than I originally thought. It somehow looks quite normal and now I couldn’t imagine it any other way.

The baseboards in our place were simply finished with acrylic sealant.

Something like this? Our guest bathroom was built (still) in 1988. It has lasted for 30 years and we also think it’s good (I didn’t photograph the golden heron this time).

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