[michaelt]

Among the people making things like a DIY NAS, who want fast USB, lots of cores and RAM, small-ish, not-too-bad power consumption, running Linux; and not caring much about GPIOs or passive cooling, it’s in competition with the N150

Among people who want GPIOs and network connectivity, a low price and an open, microcontroller like experience, not caring much about USB speeds and lots of cores and running Linux and suchlike, it’s in competition with the esp8266 & esp32. And the previous generations of RPi.

[wolpoli]

The Pi SBCs are squeezed in between the SFFs and the microcontrollers for many use cases. It's only a good fit if there is a need for the GPIOs/Linux/Display. For anything else, there are better products out there.