Since Bla mentions Luton Town as winner of that EFL playoff last season, they are a prime example of Huffy's comment. Ethan Horvath, as their starting goalie, helps lead Luton Town to promotion to the Prem and they promptly sell him. I'm not saying Horvath is a quality enough goalie to hack it in the EPL, but he could have been better than the guy they bought. Luton has a couple games left in the season and they are 3 points deep in the bottom three. They might pull it out & survive but will likely go straight back down to the EFL . If so, at least they have all those tech upgrades to play with in their dinky little stadium.
The team above them is Nottingham Forest with Gio Reyna. They're a train wreck also, although they'll probably stay up & send Luton down.