If this is interesting to you, there's still one ocean liner left: https://en.wikipedia.org/wiki/Queen_Mary_2
Buy a ticket while you can.
I had a coworker whose not a fan of flying who has done a couple crossings now, really enjoys it! I think of the Queen Mary 2 a bunch because of them, their tales. A little world of fans who really enjoy doing the crossing.
I wonder if Cunard/Carnival will ever build a replacement to her.