Reality.
De Gea, Oblak and Ter Stegen save Son’s shot last week. Ederson is better than the first two for this City team, but his skillset is very much exclusively useful to a team that requires an extra player with gloves on that doesn’t concede that many shots. He wouldn’t survive at any other top club that demands actual goalkeeping excellence.
He should/will follow Pep to Juve or PSG when he goes, because he’d be brutal under anyone else. Zach Steffen has a higher ceiling anyway, and will be our number one by 2021 either way.