Every now and then a crappy tool is exactly what’s needed. Ever had a hole in a countertop but a misaligned or otherwise inadequate hole in the plywood under it? (Or just wanted to drill a new hole through both?). Get a cheap, crappy Forstner bit the same size as your hole, stick it in the countertop hole, and drill through the plywood base. Cuts perfectly and takes very little time. Also destroys the bit very quickly. I don’t think there’s any benefit to using a nice Forstner bit for this. (A cheap hole saw could also work, but some fiddling with the drill bit portion may be needed.)

Obviously one should use a high quality diamond bit for cutting the countertop in the first place, with proper dust control.