“how bad can it be.”
Well…You have a clutch for a start, that can (and will wear out sooner or later!) be abused!
And, for me anyway, I don’t want to be ‘stirring’ gears to get around, I rather waft, after all it is a Lexus. And the top gear is not suited to our UK upper speed limit, I think you’ll find that 70 mph at civilised revs sits between 5th and 6th which is a bit annoying!