Could someone who has domain expertise weigh in here regarding the predictions quotes in CNN? I've only ever seen two meters predicted by any model at the year 2100.
And you should not think in average sea level rise as some line drawn in the sand. Tides, storms, that gigantic amount of fresh water starting to turning the climate even more chaotic and maybe disrupting some critical ocean ecosystems and currents. Anything that put us further away from the stable situation that led us to establish a global civilization may have very negative impacts.
Shelves and on land glaciers are structurally held up. It's when they enter a floating state that sea level rises, and this is the only time ice can cause a sea level rise. If parts of the shelf are cracked, or otherwise the water is supporting them, then they're already floating and so breaking of the parts that are floating will also have no impact.
I am concerned we are missing numerous potential reinforcement loops that might accelerate it. I have a gut feeling that we will see catastrophic coastal floods in the next couple of decades. I cannot shake it.