Apart from nostalgia, what's the point of buying CD's? Vinyl invariably has more aesthetically appealing artwork/liner notes, and you can burn music onto blank CD's for dirt cheap
For one their cases are more convenient than record sleeves, since you can stack them easily and always know which album is which by looking at the spine. And just the collection factor. They may not be as collectable as vinyl but they have their place. Also record players and records can be expensive.