Alright, some NY 17 fun. Our source at Region 6 posted in one of the Facebook groups that NYSDOT is making a conscious decision to remove all NY 17 signage west of US 220, as well as NY 15 signage along the I-86 and I-390 overlaps. 15 has already been truncated on TM, but this would effectively delete all of current NY NY 17. All of 17 west of Waverly/220 is concurrent with I-86, so nothing would be deleted from the system other than the NY 17 designation.
I can confirm that, apart from a couple of older overheads that are scheduled to be replaced within the next few years, most NY 17 signs are gone west of Waverly as of last week. The remaining ground-mounted signs are supposed to come down this year. This effectively means that NY 17 will be unsigned west of US 220 in the very near future (it already does not officially exist west of there according to Region 6).