I've always used a 3D Printer that has printed using PLA / ABS Filament. However, now I'm starting to see a bunch of 3D Printers that use Resin in place of filament. To me Resin seems like a better method, in that it is much faster than Filament. Can anyone tell me what the benefits of each of these are over one another?

Why would someone choose Filament over Resin, and vice versa?