Commuter bikes need mudguards esp in winter. You can play around with velcro or rubber band hacks but the best method is to bolt them to threaded eyelets. You also need sufficient clearance for winter tyres + guards. Some people prefer 28mm width in winter over the usual 25mm tyres of road bikes. If you are using the bike for shopping or touring, rack eyelets can make life easier. As with all eyelets, you don't have to use them if you have them but they carry almost no weight penalty.
A used bike in good condition with generous tyre clearance, using long drop caliper brakes or modern disk brakes, with mudguard /rack eyelets would be versatile and useful.