West Antarctic Ice Sheet (WAIS) might be close to collapse

This is a basis of argument from genetics back ported to climate science but I feel misses the bridge of causative linkage. Since we know two things are broadly contemporary it's a strong case but it's got heaps of unknown unknowns around it.

Which is a long winded way of saying "might" does a lot of heavy lifting.

Obviously terrible if correct. Highly harmful to species at large as well as society, we cling to coastlines as much as other species do.

Lat me guess: within 20 years?