[CalRobert]

It's definitely something that is considered, and the miracle on the Hudson included use of the A320's ditch mode if I recall correctly.

https://www.pprune.org/tech-log/358285-airbus-ditching-butto...

Looks to be in a few airbus models.

https://simpleflying.com/airbus-aircraft-ditch-switch-emerge...

If I recall correctly I've read that the bigger the plane the less likely it is to work but I don't have sources.