What is Reddit's opinion of Unlearning Protestantism: Sustaining Christian Community in an Unstable Age?

From 3.5 billion Reddit comments

Just look at any list of demographics by denomination. There are four Lutheran denominations in the US (two big ones). Most countries have one or two. That’s actually decreased recently through mergers. We Lutherans are also in full communion (in other words we can interchange clergy and sacraments) with six other large Protestant groups, so surveys aren’t 100% reliable at depicting the actual separation.

There is one big Catholic Church and a dozen or so splinter groups like SSPV. The goal of both groups is to reunify after discussions. Similarly, the Orthodox Church is a number of autocephalous churches that all consider themselves one big church, so Greek Orthodox and Russian Orthodox aren’t two denominations.

Meanwhile, in Baptist world, there is roughly one IFB denomination per IFB congregation because they’re so incredibly fissile. Even where more than one cooperates, they wouldn’t even consider their gatherings a denomination, and the higher levels often have no authority over individual churches. It took a century for the Southern Baptist Convention to even call themselves a denomination. Baptists consider this to be a bonus trait called “local autonomy”, but it elevates the denomination count in the US by tens of thousands.

(Edit to add: I have no idea why this is controversial. It is manifestly true.)

(Edit to add 2: Surveys also can't take into account things like Mark Driscoll's former church, which was a single "multi-site church" with simulcast sermons - but the rest of the service run separately - to 15 separate locations in five states. Is that a denomination? WHO KNOWS)

(Edit to add 3: Here's a book about it for Christians.)