Sure- just pave over a State that is exactly like the Bahamas and just about as far above sea level, which drains water into an aquifer that supports 200 feet of limestone sponge topped with. Then watch where the water can’t go and ... people cannot live.
No— what needs to happen is 4 LANES NORTH, cooperative with adjacent states, and giving people somewhere to actually go. Educate the “new” non-floridian native residents as to not piss around and get the hell out. Florida is an Island, pretending to be a peninsula. Simple as that.
I wouldn’t have a problem with the Suncoast simply continuing north into Georgia, and then GDOT could build their section, whatever they might call it, and hook it up to I-75 and I-16 near Macon.