This is great. Nice to have the hard facts.... Lots of posts in this forum that asserts general statements based on a few types of aircrafts.

Some have predicted that E+ will cause F to be reduced to 16 seats in all 738 and 739. (I believe some of the 738 has 20F). That would eliminate 200+ F seat, which would not change the overall picture much, but still make a huge difference in terms of upgrade chances when traveling on those aircrafts.