Homeowners unable to replace undermount sinks with drop-in alternatives without costly countertop modifications

Homeowners who want to upgrade or replace a undermount sink discover they cannot simply swap it for a drop-in model because the countertop cutout is incompatible, requiring expensive professional countertop work or replacement. DIY enthusiasts lack clear guidance on whether this conversion is feasible or what workarounds exist, forcing them to either pay contractors thousands of dollars or abandon their preferred sink style.