If you eat before 7:00 p.m. you probably will not have to wait for a table.
Some nights we like visiting with new friends, others we prefer to enjoy each other's company. Another advantage to anytime dining was really apparent on our recent cruise on the Golden. Many of the excursions did not return to the ship until after 5:30 so if we had had early seating it would have been a real rush and on days when we didn't be back onboard til after 6:00 (3 days) we'd have missed the dining room entirely. Anytime allows us to have the dining room experience each evening without the rush.
True, your waitstaff doesn't get to know you in terms of preferences but our last traditional dining on the Grand in April was so disappointing I regretted that we hadn't stuck with our usual anytime. I think with the larger ships, personal service is not what it once was. Just my experience and opinion.