I hear the same thing said about having a "mobile team" or an "ios team" + "android team" (that people commonly think sprinkling a little "mobile" on the codebase makes everything fine, but no, mobile should be everybody's responsibility and you shouldn't have a mobile team).

What's the limit ? Should all specialized skills be uniformly distributed across the whole engineering org ? How is that conducive to the idea of "teams" at all ?

I think this organizational strategy works better with smaller orgs.