Indeed, it is a pity that Spalletti cannot stay at Napoli much longer, because it seems that Napoli are also not ready for Spalletti's departure because of course this will change Napoli's performance next season which must also play in the Champions League. But indeed, nothing can last forever because they will change from time to time, so something like this is of course a natural thing. So yes, with those who cannot stay forever, then of course they must always be ready to be let go and must be ready to find a replacement and hopefully, Napoli's performance can still be consistent to compete in the top four next season.
It seems that Napoli don't just have to let go of their coach, Spalletti, for a while and replace him with Rudi Garcia. They may also lose one of their key defenders, Kim Min Jae, who will join Bayern Munich next season on a five-year contract, as mentioned in a tweet by renowned transfer market analyst and journalist, Fabrizio Romano. If this turns out to be true, Napoli must act quickly in finding a replacement for Kim Min Jae if they want to go further in the Champions League and defend the Scudetto title next season. Moreover, their top scorer and mainstay player in Serie A last season, Osimhen, has been linked with EPL clubs such as Chelsea, Manchester United and Liverpool. This actually presents a significant challenge for Napoli in rebuilding their squad for the upcoming season.
The influence of significant financial resources and lucrative salaries from clubs outside Italy make players willing to move and change teams. This is the current reality, as evidenced by Tonali's recent transfer from AC Milan to Newcastle. The club's financial limitations and tempting offers from other teams may force them to part ways with their stars.
Overall, Napoli face a tough task building their squad for next season, i think as the allure of big funds and attractive opportunities from other clubs can lure their players away.