I hear all the arguments...but am not sure they are really valid.
Why?
Most of us own and enjoy Mogs because of their idiosyncratic semi-vintage characters. Remove them all and you have a pastiche of a 1950s car.
The chassis is a joke, as far as stiffness is concerned, so it is part of the suspension. The suspension, well it works but can never do the job of a modern system.
If you want a car with a modern chassis that looks like a Mog it will cost you £85K. It is called a Plus 8. I'm sure MMC would put a +4GDI engine in the Aero chassis if you paid them, but who wants to pay £80K for a 6 foot wide +4 with a modern tub and suspension? Better to buy a nice little Lotus...
No, the trad Mog is what it is. Flawed, yet a delight.
Rather like many of us here....