I lease my car because back in 2015 the old A-class was going wrong a few years ago, I had to pay steep tax, MOT never seemed to come in at less than £150, some repairs, it was drinking petrol, the air con didn't work, a bit of wear on the tyres etc.
I ended up getting a brand new Citroen Picasso for 12 months at £150 per month, max 10k miles per year. No tax, warranty, modern car comforts.
After 12 months I got a Skoda Yeti DSG. Great car. Same £150 per month but 8k miles, which I didn't breach, and over 24 months.
My most recent car is a BMW 225xe at £239 per month over 18 months, 12k miles for the duration. More expensive than the other two, but it is a PHEV and I can charge it for free in work. I do about 500 miles per month and spend a max of £10 on petrol and maybe £5 on electric. The rest being subbed by my employer.
I think there's very little in the difference between a cheap lease and running a banger, but you get the benefit of driving a new car with satnav, phone connectivity, heated seats, modern safety technology.