Sometimes, I think we're making it all sound a lot harder then it is.
Crossing an ocean is usually pretty easy sailing. Boats that are abandoned seem to do just fine without any crew (dare I say they some do better once the crew leaves?)
My size boats with a crew of 2 did just fine before there was AIS
, plotters etc. and "we" decided you need at least a 45' boat with all the bells and whistles to survive the trip.
Not saying everyone go and buy a boat and cross an ocean, but no need to overthink and "over prepare" either. You can't practice ocean crossing
anyway without actually crossing an ocean
From where I am, getting to the ocean is a bigger challenge then making it across the ocean ...
Sailing near land is, IMHO, harder and more risky then ocean sailing.