This is an advantage here; 49€ a month gives us use of all local transport nationwide.
That said, 15p sounds low; does that include depreciation, maintenance costs, tax and insurance? If so it sounds like the rest of us are subsidising cars more than I thought.
Equally, the time saving for us being able to send the kids out in the morning to find their own way to school and other activities is considerable; if you added that up as a cost too, then the economics may change.
15p per day can only be considering fuel costs and nothing else. And even then, he must have a very economic car (or electric).
The cost of owning a car that is road legal is more than 15p per day even if you never drive it. Tax may be under 10p per day (mine is £30 per year), but insurance won't be less than 30p per day for any car nowadays, and very few will be anywhere near that low (mine is £579 for a year fully comp, so a little over £1.50 per day).
Depreciation of course depends on the age, model and condition of the car, it can be anything from negligible up to several thousand a year (so several £ per day).
The standard MOT cost now is about £55 - which is 15p per day all by itself. And if your car is young enough not to need that, then it is less than 3 years old, ad depreciation will be in the thousands per year range.
Maintenance costs are going to depend on how much you drive of course. But just as an example, my 8 year old Insignia estate had a full service and MOT yesterday, and needed 2 new front tyres - total cost a little under £700 (the tyres were £276 of that), so that is nearly £2 per day if that was the annual cost.
So overall, I think my family sized diesel estate, not particularly flash, old enough for depreciation to be negligible, costs me in the region of £4 per day to run, not counting fuel. Diesel is currently around £7.50 per gallon, and I get about 50-55 miles per gallon, so about 15p/mile in fuel costs.
An EV will be less, because maintenance costs should be lower, and fuel costs will be much lower. But insurance will be just as high, and depreciation will be higher.