The seat bolster on these new scooters, and other bikes as well, does bother my back.
It brings a forward lateral slap to what would only have been a vertical bump.
Without doubt, there is no comparison to the Harley Davidson Duo-Glide tandem seat.
My old 1959 FL with the rubber mounted handlebars and footboards would be similar to riding on a cloud.
( Does Not afford much precise control ! )
The Helix I ride today is described as a barcalounger on wheels, but does not even compare.
( Of course they are in a different weight class. )
All that being said, cycle riding tends to loosen body parts up that would otherwise become stiff and eventually atrophy.
I am far better off riding conservatively on short hops around town than not getting that bit of exercise.
All opinion, though... It will be a personal decision how your circumstance fits into all this.
Best
redk