[ehaskins]

I have current products using raspberrypi and i.MX parts, and have worked with teams using TI and Renesas parts. Some fully custom boards, some SoM based.

Their BSPs all suck to different degrees, but you can work around the issue with enough effort. If I had to choose ignoring cost, I'd pick an i.MX part, but they're priced for the industrial consumer where price isn't a big concern.

Stay away from any asian parts (Allwinner) or phone parts since they seem to have no vendor or community support.

Like others have said, some of the SoM vendors do a pretty decent job of hiding the evil, but that often comes with very opinionated BSP layers which limit your product design. We've had to ignore/replace all of our SoM vendor's layers, borrowing the few useful parts as needed.

[cjk]

FWIW, some of the Allwinner stuff has fairly robust support in mainline Linux, and there are ongoing efforts to upstream missing bits: https://linux-sunxi.org/Linux_mainlining_effort

No vendor support is probably accurate, though.