I agree with the NUCs, a good compromise ive found is the Lattepanda Delta or Alpha. I don't have a Pi 400 but I have a similar cyberdeck that has the addition

I agree with the NUCs, a good compromise ive found is the Lattepanda Delta or Alpha. I don't have a Pi 400 but I have a similar cyberdeck that has the addition of a screen with the keyboard and board. I use it as a swiss army tool on the go for managing my cloud servers. Its like the classic monitor and keyboard you have hanging on top of your rack, but portable :D