As a Florida resident and native, I've been telling people for years to brace for a "Goreicane", which is a cat 6 named after Al.

Irma reached +180mph before magically dwindling to a 3 (or weak 4?) just before landfall. By then, we were already without power, so stats were unknown. I made a safety box out of a toolbox into which I stuffed my cat and provisions, as I wore an old motorcycle helmet and combat boots clutching a bugout bag and bottle of courage.

I really didn't expect to do well and had it hit as a super 5, I'd probably not be leaving this silly post.

But cat 6 is real. We'll see it soon.

Your recollection of Irma's intensity is not particularly accurate. It was never anywhere near 180 mph "just before landfall" unless you were in the Leeward Islands on September 6. Irma crossed the Florida Keys on September 10 as a weak category 4, with 130 mph winds, but it didn't dwindle to that weak category 4 status, it intensified to it. When it left Cuba and turned toward Florida, on September 9, it was only a category 2 (and there was nothing magical about why it dwindled to a category 2 — it was because it ran into Cuban terrain). It did weaken a bit, down to a 115 mph Cat 3, between the Keys and it's second landfall in Collier County.

Hurricane Dorian, in 2019, was almost a "Cat 6" kind of experience for Florida. It made landfall in the Bahamas with 185 mph winds and then just parked itself there, barely moving, for 24+ hours, maintaining Cat 5 strength the whole time. If it had done that on Florida's east coast, as it was once forecast to, the economic destruction would have been unbelievable.