You can cover the carpet under your chair with one of those carpet protectors, but my reason for not using carpet is pins getting stuck in it. When we built my sewing room, I wanted dark laminate flooring so I can see pins more easily against the floor. I admit to being lazy and not always chasing down every pin the second I drop it so if I had carpet the odds would quickly stack in favour of me stepping on a pin that has made it's way into the carpet. At least on hard flooring they continue to lie flat until I pick them up. And honestly, I must drop pins without realizing because I usually "track" the dropped pin until I do fetch it but seem to find strays in odd places.