The modularity means you can change your workflow or peripherals without needing to find a dock or dongles long term. You can travel with the HDMI dongle in for putting a movie on a hotel TV or use with an external monitor somewhere. Maybe you need that SD card reader for most of your photo work but only on weekends or trips when you go process images immediately or need to offload them from the SD card.

Regardless, the port can be what you need it to be or just a useful USB-C, you aren't tied to whatever ports the OEM thinks you'll need forever even though it may only be valued by a small number of consumers.

That small number is still enough to drive sales for FrameWork. I'm interested if I need a better laptop and I sit at a desk with desktop in use almost all the time. This appeals to those that interested in more control over their device in configuration, expansion or modifications, and the various ports and IO options. I can't say I'd buy many of the USB modules (rarely would use most anyway) but the mentality is there and I so far have trust in the product. It's not meant to appeal to GAMERS or Enterprise execs, just those that want more control over their devices.