Although I enjoy mine, I have a 40 mile hilly highway commute that forces me to constantly shift up and down 4-6th gear. It's actually becoming annoying. On weekend when I take a backroad blast, it establishes my love for this car. I am definitely heading toward the end of my ownership this year.
Ohio valley is nothing but hills and don't have any issue with having to downshift for them... save for the fact that the people ahead of me often don't have any concept of momentum. So they crawl up the hill, build momentum on the downhill only to
ANNOYINGLY cause me to brake just as they hit the next uphill. Cycling I learned to literally attack the downhill and beginning of the uphill which would make the last third of it simple. So yeah, whether I'm on the sport bike or FiST, depending on who you're behind if anyone, the downshifting is just a manual transmission thing that you don't necessarily notice in a torque-converter based automatic shi(f)t tranny.
Another point, I think a lot of manual trans owners are thinking they're lugging the engine when they're really okay; more especially if they're naturally aspirated or late-model stock turbo. If putting the hammer down for rapid acceleration from take off doesn't damage the engine, neither will moseying on up short hill at lower RPM. Damage only begins to accrue if the engine literally overheats, or/and the crank looses inertia and begins to stall. Barring ridiculous extremes, a little stronger vibration pushing a hill doesn't hurt it, absent of the aforementioned conditions.