20-30ft sailboats are hardly what you think of as ocean going or “blue water” boats. Most people cross ocean on larger boats over 30ft.

sailboats are increasingly easy to electrify. Tho I have no data on how many people do it. There are huge benefits in going electric and the tech is becoming quite mature

That said most boats you will see out there owned by real humans (not charter companies) are 30+ years old with 30+ years old motor in them. Sailors rarely replace the motor unless they absolutely have to.

Sails boats definitely. Day cruisers /small motor boats also. I think the big motor yachts less so at the moment.  They demand range in thousands of nautical miles which is tough.