I had a cat a while back, and when I travelled for a few weeks, my sister, who lives in the same building would make sure she’s fed and the litter cleaned etc and spend a bit of time with her. However, my sister told me that Pickett (cat) seemed depressed, and true enough when I got back she gave me attitude for a few weeks, and so I adopted Snowy for her. He basically taught her how to play again, since she’d been seemingly wanting to grow into old age and just sit on my lap and doze happily for hours.

But, I also had another cat in Dubai decades earlier, and she was quite happy being alone. In fact, she didn’t like anyone but me (she was a rescue).