That was a really big deal—more so than this one, I still remember the daily radio news reports and huge newspaper headlines from when I was a young kid. It was an international crisis that dragged on for months and months.
Maybe there's now some virtue in dusting off the old proposal for second canal route via Israeli territory (of course, sans the nukes this time).
https://en.wikipedia.org/wiki/Suez_Canal#Suez_Crisis
"To save the British from what he thought was a disastrous action and to stop the war from a possible escalation, Canadian Secretary of State for External Affairs Lester B. Pearson proposed the creation of the first United Nations peacekeeping force to ensure access to the canal for all and an Israeli withdrawal from the Sinai Peninsula. On 4 November 1956, a majority at the United Nations voted for Pearson's peacekeeping resolution, which mandated the UN peacekeepers to stay in Sinai unless both Egypt and Israel agreed to their withdrawal. The United States backed this proposal by putting pressure on the British government through the selling of sterling, which would cause it to depreciate. Britain then called a ceasefire, and later agreed to withdraw its troops by the end of the year. Pearson was later awarded the Nobel Peace Prize."
A well hidden explosive charge on a container ship in the canal could cause a multi-month blockage - perhaps longer.
It would probably be smart to dig a 2nd channel.
That aside, the idea of raising the water was valid and was ( luckily) available though nature. It wasn't mentioned before it appeared here. See: High tides.
And cofferdams could have been used when the situation was much worse. But the logistics of organizing it would have been painful ( https://news.ycombinator.com/item?id=26587692 )
Which is what followed when bringing up: "temporal dams" surrounding the ship. Which is obviously very different than "building giant elaborate dams".
But ofc, not everyone actually reads the things that are said and some just interpret their own prejudice. Degrading the whole discussion.
I feel like there's something to be learnt about computer engineering. We naturally go towards ego-massaging solutions.
Edit: I think I saw an earlier article, other reports are now saying it's fully floating and moving.