Not sure I get your point. The PDP-10 has no notion of bytes in the arithmetic unit, it's all words (and hence there's no endianness). The byte instructions are

Not sure I get your point. The PDP-10 has no notion of bytes in the arithmetic unit, it's all words (and hence there's no endianness). The byte instructions are handy ways to load/store parts of words, sure, but I feel like they're more similar to modern bitfield instructions and feel rather tacked on (they were optional in the KA10 even) rather than being a central part of the architecture. Come to think of it though, byte pointers move right in the word as they're incremented. Guess you could count that as big endian.