I don't blame Hilton. I'm sure we'll find out soon why this decision to quit accepting United miles was done quickly compared to the much longer time between the announcement and the deadline to quit accepting DL transfers. I transferred 50K DL miles when they quit accepting DL miles in Feb. I was fortunate enough to be reading this forum at 11:15pm, I just transferred 45K miles and will end up orphaning 3K.
Thanks FT!