Given that it is driven 12k miles a year ...will an hybrid last as many years as a conventional car (before excessive repairs)....I do not think so because I think that electronics will degrade before mechanical parts do. Most mechanical movie film cameras made in the 50's still operate, but most video cameras made in the 80's no longer function.
Our experience with the Prius is that is holds up very well over time. The Prius Hybrid Battery failure rate below 200k miles is low. Inverter failure is not common. Some of the motors in the transmissions will fail but not at low mileages. The Honda Civic hybrid has a had battery problems at lower mileages. The risk with a hybrid is that hybrid designs have two extra expensive parts that can fail; the Battery and the inverter.