The use of a classic accessible bathroom usually involves several successive transfers (to the toilet, to the shower or bath, etc.). Furthermore, it does not provide a comfortable solution for drying after bathing. This can be solved by a platform where on one side the person washes under the shower and then slides across to the other side, which is dry, where the person can get dry and eventually get dressed.

A transfer board is a fairly expensive object in a specialty store; in many cases, a cutting board performs the same function for a tenth of the price.
(The transfer from the bed to the wheelchair, for example, is much easier if the fabric of the bed cover is silky)