I'm curious, and just for the sake of conversation; what's the difference between "just sayin' " and "just saying"? Same number of key strokes, so there's no savings there. I've seen this convention used by several people and as I mentioned, I'm curious.

"The larger the engine, the more HP". Does that apply to muscle car engines only? The reason I ask is, my car has a 1.4 liter or just about 85 and a half cubic inch 4 cylinder engine rated at 153 horsepower. My motorcycle has a 1833 cc, almost 112 cubic inch 6 cylinder engine rated at 126 horsepower. A previous car of mine had an approximately 79 cubic inch engine rated at 255 horsepower while my trucks 366 cubic inch engine is rated at 300 horsepower. The smaller engines produce more horsepower, or at least a higher horsepower to displacement ratio, but none are muscle car engines.
Many years ago I owned a 1966 Chevy Impala SS with the L72 427 engine. Now that was a muscle car with 425 horses under the hood. That's almost 1 horsepower per cubic inch. Interestingly enough, my motorcycle's 112 cubic inch engine produces 126 horsepower which is more than 1 horsepower per cubic inch, making the motorcycle more muscular than the muscle car.
All of which is totally irrelevant but it brings more depth to the conversation and I find it far more interesting than crop factors, plus it brought back some really good memories.

Sorry, but a car engine size and horsepower is a very bad example. It is not nearly so simple with car engines or sensors.
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My son has run 900 plus cubic inch nitrous injected motors and supercharged motors. He was crew chief on a twin turbo car that won the World Series of Pro Mod race in Colorado last August. So I know enough to be dangerous. Simple comparison and generalizations may seem like a good idea but engine horsepower and camera sensors are more complex in reality.

The crop cameras produce wonderful images, we all know that. If it is to be a billboard, I suggest a larger format, however, FF won't come close to their senior medium format brethren. So why not put this to sleep. Each to their own. The analogy regarding large displacement engines is interesting. Corvette ZR1 or Z06s and various iterations of the GM LS7 small block are running circles around big block vehicles with their small block 650-750 HP aluminum motors. Dodge says the Challenger Hellcat Redeye big block will run the quarter mile in 10.8 seconds at 131 mph and zero-to-60 mph in 3.4 seconds. The 2019 Corvette ZR1 small block reports in at 0-60 in 2.85 seconds. "Beauty" may be in the eye of the beholder methinks.

Try running a big block motor in the Trans AM races across America. Those small block screamers may not have the torque of their larger cousins, however, they have the horsepower and best of all, will out handle (i.e. win races other than 1/4 straight-line drags races of the past) when pitted against the big blocks. Cropped cameras are usually smaller and much more svelt & easy to carry/use/manouver. As I say, each to their own.

Cheers!