FWIW, sailing with a cat could be considered sailing solo, or not, as the cat decides.
Going away for two or three nights on your own is one of the great pleasures of the world.
All you need is a good supply of books,some nice wine and your favourite music. With so much going on, it's a circuit breaker to the world.
It definitely helps to have a secluded cruising area to enjoy it all in. One of the great joys is to wake up in a bay with not a living soul around, no boats ,no people and no phones.Maybe just the odd Garfish or two.