It won't be free for the latter 7 years, because obviously, £9614 isn't the cost of the car new - it's the monthly leasing payments added up over the 3 years.
The cost of the car new is about 2.5x-3x of that (I haven't checked, exactly).
Furthermore, as the car gets older, the servicing will get more expensive, spark/glow plugs, cam belt/chain, various suspension components (bushes, ball joints, etc), the aforementioned battery, then over the 9-10 years, I would imagine you'd need to spend at least half a day, here and there (taking time off work if necessary, or preventing you from doing other things if it's your day off), getting tyres replaced, and at least a set of discs, and replacement pads, MOTs, etc.
Servicing, I can get away with having it twice over the 3 years - which is generally a routine oil and filter change. So the car will be serviced during the 13th and 26th month of ownership, and there'll be 23 month gap between the 2nd (and final) service of one car, and the 1st service of the next car.
Then, eventually, the car is out of warranty, and any problem arising out of a 8-9-10 year old with it's complex electronics and usual software updates, could end up being costly.
It's not vanity, I'm paying for, it's peace of mind, that the car is always new, and I'm not wasting time at garages getting things fixed/replaced. Otherwise I wouldn't have a small Hyundai, and have something more flash instead.