Umm... Complexity (especially with integrations) and regulations were two areas explicitly mentioned in the article as areas where you can still differentiate.
Yeah the vibe-coding sites are pretty bad at SEO although some are now putting in some better SEO frameworks like H1 tags and og data. I wonder if this gets fixed over time.
Nice post. A more pessimist view is that MCPs become Amazon Alexa plugins- where you are dependent on an inconsistent Alexa to figure out which plugin to use and limited to only a few.