The RNLI and the other independant rescue organisations are superb and deserve all our support.
This event does illustrate some important points which were discussed in the Tech Corner article on off-cushion stability. It's important that a craft will float reasonably level and stable when swamped - this one did not, you can see how easily the RNLI guys rolled it over. Thats because it did not have enough bouyancy located far enough out towards the gunwales. This is a particular issue in craft with wet plenums, where a dry plenum is used you see much better intrinsic off-cushion roll stability.
If the swamped roll stability is poor, it'll tip you out and you won't be able to get back on the hull, upturned or not, as it'll continue to roll over each time you try. I can tell you its a huge relief to be out of the water and sitting on a floating platform whilst waiting for rescue, rather than in the water.
The good news is that it would be very easy to check your own craft, to see if it has floatation material fitted in the plenum. If it does not, then with a little ingenuity it is relatively easy to fit some. So go and check! Anyone with a wet plenum craft should be doing so.
Ian