Aribo will be leaving with experiences he will never ever repeat, i wish him good luck but there will be no more sensational buzzes, plenty more pounds though.
Can look at it another way though. He has just had the season of his life- 70 games, scored in the Europa League Final and where's he going? Southampton. This looks like as good a move as he is going to get as we pretty much hit our ceiling last season.
Therefore not only is he being better paid but you could argue if he has the desire to get to the very top of the game then it's a bit of a gamble trusting his ability.