I currently have a System76 laptop, and sincerely regret my purchase. When I purchased it, the Framework was not out yet - I wanted to support a company that supports right-to-repair, and figured since they controlled the hardware, firmware, and software (Pop!_OS), it would be a good, stable experience. It has not been, and support has generally been poor. I know other people have had better experiences than I have, but personally, I won't be buying from them again.
I haven't personally used Purism, but former co-workers spoke really poorly of them. They were trying to buy a big batch for work, and said the build quality was awful. Additionally: https://youtu.be/wKegmu0V75s
My usb-c ports can be a little touchy, too. The SD card slot is also really bad - the card has to be positioned perfectly to slide in, or it jams. I'm also upset that the usb-c port can only be used for charging after a full boot. It cannot be used to perform firmware updates, or even to do a ram test. This means day-to-day, usb-c can be used, but I have to keep track of the barrel charger, just in case. This, of course, was not specified on the product details page (nor, I think, that only one of the two usb-c ports could be used for charging - it's possible I overlooked that, but still frustrating on an expensive laptop that lists usb-c charging as a feature).