Thieves don't nick them using keyless entry on the more recent cars, and any car from any manufacturer is prone to relay attack when on the older tech (Fords being the most nicked car). When you look at different countries you get differences, Merc and BMW in Spain, Kia Stinger in Germany.
The challenge is that the JLR products are one of the most desirable and hence they are targeted by the big crime teams, they found a way to hack and decode the CAN interface (they could do this for any make but, most are not worth bothering with as its expensive to do). That said, many of the cars that get nicked are not locked (we have all the stats and meet regularly with the Police car crime team)
This can hack method is being closed (and does not work on the latest models).
Its an arms race, and always will be, we have further tech in the wings for the next gen.