FVRCP booster for mature indoor cat?

My (almost) ten year old male Birman is due for his FVRCP three year booster this month. He is an indoor cat. What is the current wisdom about these boosters? 

Why We Vaccinate (Even Indoor Cats), written by a feline specialist, gives a very good rundown on the inoculations, schedules and recommendations. Many vets recommend core vaccine boosters, including FVRCP, up to the age of 14. Senior cats are more susceptible to calici virus infections in particular than younger adults.

Thank you, JCat. That is a very interesting article.