The Panda is one of the best cars we use for access due to the wide opening doors and tall profile of the body.
This is what I hear from much of my older relatives as well. Even some who went from a life of nice, big BMW after Merc after BMW, to some form of city car in retirement. The reason, easier to get in and out of. Only one bought one of those hideous, 2-Series and then a B-Class Merc which I suppose was probably also 'easy enough' to board.
I have no mobility issues (yet) (thankfully) at 28, but I find the Lexus CT a right pain in the *** to get in and out of with the stupidly long front door in car parks... requires a weird sort of twist and arm to hold the door from hitting anything. Then the seat bolsters are incredibly stiff and don't give way for sliding past them. Recently seen a tear down... they literally have a metal support inside them like a cupboard handle to achieve that. No wonder it hurts!!!
The Panda, in contrast, is just 'Easy' (I can see where the design ethos / design teams logic came from in naming the trim levels). Tall, doors open wide, square edges to fit everything (even tall people), gear stick up within easy reach. Pedal position / tightness might be the exception, the few people I let drive my Panda's were mostly shocked by that in the first few minutes, but something you get used to quickly.
I was out scanning trouble codes on my sisters 2016 Suzuki Vitara 4x4 last week and was shocked by how much of a Panda like experience it was to sit in. Same sort of proportions and 'roominess' feeling. It's quite narrow compared to what I expected, and other than the tall roof and space, you don't feel like you're that 'high up', the big windows and airy feel give an illusion of size, which is strangely opposite to how 'spacious' the Avensis I had felt, that had plenty of room length and width wise, space for everything, little compartments, but the roof line was (relatively) low. I'd argue the saloon is more practical from a passenger comfort point of view, not so much fitting things in the boot (the opposite of practical on the saloon).
The Vitara was a bit disappointing with the handling or lack of. Not terrible or dangerous feeling but just not something I'd choose over the likes of a large saloon or even hatchback like the Panda (or more sensible cars like a Focus size). Practical, but with some comfort.
These SUVs don't seem to be much bigger footprint on the road size-by-size, they don't feel like they offer much improvement inside practically and they don't drive any better than lower cars. I really,
really don't get it.
Still, Lexus like the rest of them insists on going all SUV (and at a cost that I'll likely never be able to justify). Fiat (Stellantis) seem awfully committed to city cars, even if they are a size too big from ideal size now.. the sales of the C3 / Corsa should guarantee they don't go away even if they keep killing other car size segments.
Let's hope they keep the B-segment Grande Panda 'easy' to get in to. But from the photos... it's also exhibiting signs of being a little too tall for the narrowness and trying to look like an SUV :-(