A: I don't like to stand in the dark for a half hour or more.
Scaredy cat

B: I scratch sheet film when I try to tray process - no matter the size, no matter the number of sheets.
Tray developing 14x17 would be one sheet at a time anyways. No chance of scratching, unless you have long finger nails. I've scratched more 8x10 sheets loading tubes/drums than I have in trays. I do love my BTZS tubes as very little chemistry is required. I imagine a tube for such a large sheet of film would be huuuuuge.