I wonder if this will become a thing. Researchers are going to put a plaque in Iceland memorializing the first lost glacier in that country.
It will be at the site of the now-extinct Okjökull glacier — nicknamed the “OK” glacier — in Borgarfjörður, Iceland. The hillside will be known as "Mt OK."
Deglaciation in Iceland occurs at a rate of about 40 square kilometers per year. Glaciers cover about 1/10th of the Earth’s dry land. Wikipedia says "The 13 largest glaciers [in Iceland] have an aggregate area of 11,181 km² (out of about 11,400 km² for all glaciers of Iceland).
Hey, that's 285 years worth of glaciers in Iceland. Nothing to worry about.
People in the distant future will wonder what a glacier was. They'll wonder what it was like to have a stable coastline. They'll wonder how we could have been so stupid. Maybe the Baby Boomer generation will become known as the Baby Doomers.