I don't have a M3W (yet) but merely an F Super in restoration. However, the answers (so far) seem to me, to apply to any Morgan, 3 or 4 wheels.
-- I just love 'off the wall' small performance cars . . .
-- everybody can drive a normal car or bike! the fun factor is exceptional!
-- As an antidote to the relentless ethnic cleansing of feel, accessibility and fun from too many modern cars.
-- I agree to much kit & technology on modern cars is removing the fun.
-- For me it is a unique blend of heritage and madness that delivers more fun and smiles per mile than I have experienced with anything else I have owned.