It involves one of Italian major banks, and a large provider of digitally signed services
It looks a lot of the issues of the CA involve also Intesa SanPaolo, one of the biggest Italian banks. probably the biggest after it bought UBI Banca last year.
It also involves Infocert, which is a company that provides many service based on digital signatures and secure authentication: PEC, the certified e-mail, SPID, the authentication method used to access government services, and the now mandatory digital invoices. It has many users.
Removing the CA will start a lot of fireworks in Italy, I guess...