Seems silly..though I don’t know what the engireering parfameters are. But it you’re gonna build a new canal..you’d want to be able to handle the huge new container ships...they’d be willing to pay a fortune in transit fees..also, re the border ncident and the river, I recall reading somewheres that the PC expansion had to be redesigned..( the locks) because there isn’t enough water in Gatun lake to handle everything..
It seems to me that someone should ping you to this thread...
Unless you’re willing to take the financial hit to exclude supercarriers.