Having moved allegiance from Renault, previously owning 12 in the last 25 years (the last 6 all brand new, the other 6 never more than 2 years old) I can only give the reason we decided to switch, which was Renault were building cars that outwardly got bigger with each generation. The car which I have now, and the trade in for my new Jazz is a Clio (TCE100 which is a 3 pot 900cc). Before the Clio we had 3 Capturs. We downsized the last Captur because the latest version got bigger. We looked at the way cars were getting bigger, but never really benefitted internally. I never had any issues or problems with any Renault we owned. Mechanically sound, economical and cheap to run and service. Ultimately, this time we looked at a small, reliable, technically advanced motor... but something that would give us a versatile internal space. We do a lot of cycling, camping, outdoors type things and we're also aware of the ecological impact bigger cars are having.
I honestly believe that the SUV (pointless) bubble will eventually burst, and smaller cars will once again become fashionable. The Jazz may not be the most attractive package on the outside, but its certainly got a lot more advantages than larger cars.