Eventually, once the roots are trusted natively in enough systems, dropping the cross-signed root, making handshakes smaller and path-building simpler. Also some of their roots are stronger than the cross-signer, so when&#x2F;if the cross-signer becomes too weak and gets dropped, the better Amazon roots will stay.<p>And I guess being a first class citizen of the CA space, which is good because it brings audits, participation and accountability.