Totally different.
Grealish was a record fee at £100m not so long ago.
It's safe to say we know what we're getting.
It's an actual loan, and one in which we retain an option to buy.
Clubs paying a big fee hoping to untap potential, which selling clubs can take back on a whim - feeder club/glorified loan.
What next? A take back fee - force the selling club to take a player back if they don't perform?!
No wonder Everton never bought Doak - optics would have been horrendous with a buy back. Thankfully for the likes of Liverpool, there's no mark teams who'll oblige. They bank the PSR benefit, and mitigate the risk of losing elite talent. Everyone knows their place.
If it was up to me, buy backs wouldn't be allowed - just on the basis they risk circumventing loan limits.