Some of that seems a little unfair. The desire in the first paragraph is for a fully-integrated, vendor-supplied SDK for a single board where everything works.

Some of that seems a little unfair. The desire in the first paragraph is for a fully-integrated, vendor-supplied SDK for a single board where everything works. The bit in the second is about doing configuration and integration work on new hardware. I think both criticisms are reasonable but they aren't from the same perspective. In this case, yes, Espressif (who I'm not affiliated with and don't want to speak for, though I have worked on the ESP32 -- it was actually Zephyr's launch hardware for SMP, as it happens) doesn't quite have everything wired up yet. And that's unfortunate, but not so much a ding at Zephyr as with this particular integration (other chip vendors, Nordic especially, tend to be farther along). And as for doing devicetree work... yeah, I don't like it either and try to stick to the kernel. But it's a ton cleaner than the kind of cut/paste you see with other solutions (and especially with whole-board IDE/SDKs!). In Zephyr, if you have a part that has an instance of some existing hardware integrated on another platform (a Synopsys DMA controller, some third-party I2C accelerometer, whatever), the configuration is usually/hopefully as simple as a three-line block of DTS with the addresses and interrupts filled in. For platform integrators, it's probably our single most attractive feature.