I think it has a good chance of happening with Mike-cannon Brookes and Andrew Forrest pushing it along. I hope it's better protected than the internet subsea cables, those things get cut about once per year.

Cut internet cables is just a matter of statistics, there are simply a lot of these cables so a even individually rare events happen relatively often. Submarine fibre cables already carry significant electrical power for the amplifiers and are well armored, I doubt that elictricity cables would be much better. The issue is typically ships ignoring no-anchor areas, that's also why most of these cuts happen in more unregulated regions.