The post is in the link, the article with more background info is here (it cites the mastodon post): https://www.androidauthority.com/custom-roms-vs-google-3469378/
I originally saw the article on this post on !android@lemdro.id and went looking for links.
They posted it from their own instance, too, so it’s not like they have to worry about character limits; they could just remove the limit on their own posts.
Microblogging is terrible, I can’t understand why it’s still the preferred format for these types of platforms.