I think a good Alt History article can be useful for understanding history, because a good article shows exactly the range of players and factors and how they interacted. Bad alt-history is just fantasy or wish-fulfullment.
I might humbly offer these three posts as a decent example of "what if" hypotheticals discussed in a historical manner.
I might humbly offer these three posts as a decent example of "what if" hypotheticals discussed in a historical manner.