That is the best move from Napoli. Conte is a coach who knows Serie A very well and he can definitely have a good performance in Napoli after they give him the enough tool and players he need to have in this team. Also considering the potential in this team, I think Napoli can be the team to race to the top of the Serie A table in the next season and there is even the chance for them t have the chance for winning the Serie A title. Meanwhile, the other teams like Juventus and AC Milan couldn't hire better coaches for their teams and the only stable team is Inter Milan with Simone Inzaghi.
only thing that can guarantee Napoli future is Napoli management or president, which is currently the main problem related to the bad things that Napoli got last season because even though they got a very reliable coach, it will be very futile in the future when Conte seems to fail a little and is fired, of course will only get the same results.
Napoli does not lack anything at the moment in terms of finances and quality players to be able to compete with other top teams but Napoli needs a high level of commitment at this time to be able to maintain one coach in the long term.
I really believe that when Napoli can put their trust in Conte who has very good experience, Napoli future will change for the better and Osimhen and the other players will be able to perform like before when they were with Spalletti.