Your loss. Have had a Model S for almost 4 years and it is absolutely amazing.

Also I probably should point out that when the updates come out it is still up to the user, at least to some extent on whether they want to upgrade or not. I think it turns into a snooze game though but I know there were people that held out for years on software updates because they liked the old UX better. So you don't HAVE to update, its just pretty much universally preferred to upgrade.