There is no reason a tiled shower floor can't last 30years with modern materials, technique and good craftmanship. And mud deck is outdated. Many dudes still use it but it is much harder to do correctly and much more labor intensive. I use the custom CNDd tile ready pans from these dudes
https://shower-concepts.com/
Yes, Schluter has a good system and good products but they are really expensive and not unique anymore.
Also, you can do large format or even slabs on shower floors now. I've got some kick ass Ukranians that do slab showers (floors and walls) for a very fair price. There are linear drains that are really easy to waterproof these days.