Napoli winning Serie A for the first time in 30+ years and having their best ever showing in the UEFA champions league to only then sell their best players that next summer window would be a very bad thing for Serie A in my opinion.
I understand if they sell Osimhen, his stock will never be higher.
However, if they sell Osimhen, Kvaratskhelia, and Kim all in the same window after their best ever season, then one could begin to question if Serie A is serious about returning to the tops of world club football.
Serie A not only needs to get back to attracting the worlds best talents like it did, but to be able to retain those top talents for years at a time.
Obviously, easier said then done.