A curbless or hobless entrance for special needs access is more readily achieved with a modular system, as the levelling of the shower floor to the bathroom floor is inherently problematic with non-modular systems as they have no on-site adjustment.
A curbless or hobless entrance is easier to implement using a modular system because adjusting the shower floor level to align with the bathroom floor is problematic with non-modular systems, which lack the capability for site-specific modifications.