Originally Posted by
Centurion
There is an entire thread based on upgrade windows gone
That thread is, IMO, entirely an example of confirmation bias, and is based upon a questionable understanding of the meaning of the term 'window'. At any rate it doesn't match my experience
Originally Posted by
Centurion
and other threads about lack of upgrades
Also not my experience.
I don't dispute that there are some cheap F fares out there, but they haven't translated into a meaningful impact on my upgrade rate. YMMV.