So, if I’m understanding this correctly, the reason you said:
is because you combined the AI slop explanation:
with the inconsistency in noting fixed CVEs in the Github releases, and just assumed they were removing some CVE fixes because they were too hard to merge with the “deep custom security patches”? If that is not what happened, then I have no idea why you would assume that they don’t have the same CVE patches as other forks based on the same version of chromium.
To tie it back to UC, that project is much more likely to inadvertently do what you assumed Trivalent did, since instead of source code changes being entirely comprised of git diffs that will generate visible merge conflicts when relevant, they have scripts that edit source code as well. This could lead to unnoticed conflicts, including those involving CVE fixes.