The Jets just shipped three second rounders to move up three spots. The Bills need a QB more than we do, are closer than we are, and have an extra 1st, 2nd, and 3rd available in this year's draft. That's immediate return for a team to move back. We don't have that. We would have to give up multiple years' worth of top picks - we're talking like 1, 2, and 3, for three years.
The Eagles only moved up six spots, and while they gave up a 3rd and a 4th in '16, the 2017 pick they gave up was replaced by the Vikings' 1st round pick in trading away Bradford. Ultimately, all the Eagles gave up was a 3, 4, and a two that was two years down the line. It wasn't "a ton." And regardless of the move, the guy that won the Super Bowl for them was not the guy they traded for. I don't know why people keep glossing over the fact that Wentz hasn't even played in a playoff game yet, just presuming he was going to keep rolling and win the whole thing. But again, they didn't give up much. We're looking to sell years and years of draft picks for an unknown with a swiss cheese roster.
As for the Rams, yes, they gave up a ton, but the fallout of their decision is very much in flux. They had one good year. Are Cooper Kupp and Robert Woods a good enough receiving corps? What happens to Goff if Gurley is hurt and not accounting for 2,000 yards of offense? Plenty of questions still to come.
See above. Wentz didn't win them any of the playoff games that took them to the Super Bowl.