Ditch the curb, you don’t need it and roll into the wettest area of your home. And another misconception, drains don’t have to be in the middle of the floor. Whether custom tile, insert or tub-to-shower conversion, you can have a shower with flush entrance. Water will not get everywhere and can be directed as desired by gravity or even sucked down the drain.
Bottom line, curbed showers are dinosaurs, and only present an accessibility challenge if you ever lose mobility for any reason (e.g. pregnancy) or tripping threat if you’re not paying attention (e.g. children).