We have the Bette Flor mentioned earlier with a central drain. Even there, it quickly happens that the water accumulates. And the thing is not easy to clean nicely either. Besides the hair in the strainer, presumably soap residues also settle somewhere in the pipes because the pipes first run 80 cm towards the wall without much slope. A drain closer to the wall would certainly be better.
The advantage of the tiles is possibly the integrability of the underfloor heating.
As an alternative to the two options, tiles or enamel shower tray, there are also showers made of mineral cast.