My understanding is that Jags are a lot more reliable these days and that this has been the case for a number of years. The old joke used to be something like 'if you are going to buy a Jag then get two so you can continue to drive whilst the other is in the workshop'.
Land Rover on the other hand...
(The old joke there was/is "If you are going to drive into the desert take a Range Rover. If however you want to return take a Land Cruiser")