I've been using the $1,500 model of the XPS 13 (9380), which includes specs like an 8th-generation Intel Core i7 processor and 16 GB of RAM, topped off with a healthy-but-lean 256 GB of storage.
It's everything I'd want in a laptop, and it does whatever I want it to without much of a fuss. Even the price tag for the specs isn't outrageous.
One thing I should note: small and light laptop models like the XPS 13 typically run on "low power" versions of processors. For reference, the XPS 13 I'm using runs on the Core i7 8565 "U," a chip designed to consume less power so it doesn't produce as much heat and allows for better battery life. Because it consumes less power, it's not as powerful as processors on larger laptops that can handle more heat. Still, the low-power versions of processors in the XPS 13 will likely do the trick for most people.
If you're looking for unquestionably strong performance for harder workloads, like long photo or video editing sessions, you're best bet is going to be larger laptops that come with processors that have the letter "H" after the model number rather than the letter "U" or "Y," which denote low-power models. For example, the processors in the larger XPS 15 laptops have an "H" after the chip's model number that denote it's a more powerful chip.
At the end of the day, however, the top-end XPS 13 will still handle harder workloads, but not quite as well as the larger, more expensive laptops with more powerful chips, if that's what you're after.