Is he a top keeper? Id rather wait until next year and sign whoever is "hot" at the time. Maybe activate a Donnarumma €50, 60m, 70m clause.
And he will cost us 15-20m?
Donnarumma is not better than him and looking out for a hot signing and hyping him up as a Buffon replacement will simply put more pressure on that said GK. Absolutely nobody right now can replace Buffon properly.
Until we have a world class replacement ready, Szczesny will do good for now.
Look at Madrid. They're happy with Keylor Navas even though they could potentially make a shinier signing in De Gea.
Szczesny was excellent last year. He deserves an opportunity here.