For modern bathroom designs that are smaller in size, such as a 1 x 2 metr bathroom, it is better not to use massive insulation so that the bathroom is not stuffy and looks wider. Bulkhead can be removed when it is not possible to divide the wet and dry areas in a modern bathroom design.
Applying semi-open bulkhead such as modern small bathroom designs can also be an option. In fact, at first glance this modern bathroom design seems like it does not use insulation at all. Transparent insulation that is only installed near the shower head is able to protect dry areas in the bathroom from splashing water.