One of the biggest lessons I've learned from doing Fuldapocalypse is that there just isn't nearly as much of that out there as I thought. Most readers, even those of cheap thrillers, don't like that. And many authors frequently get things hideously wrong (I'm not even talking context, I'm talking basic details, my go-to example being William W. Johnstone's 'Abrams M60 with an attached flamethrower' ), showing at least they don't care too much for the topic either.
Beyond Larry Bond (who actually has some talent at a very hard to master subgenre) and a couple of really obvious niche imitators, the rivet-counting tale just isn't there outside select indie circles. It's very much an online AH problem more than it is a fiction or even necessarily print/visual AH.
Thank you for a term: 'rivet counting' Coiler to sum up precisely what I sometimes get demands for/complaints about from readers. I have read books by Peter Tsouras which I would challenge as being on this basis, notably
Disaster at D-Day: The Germans Defeat the Allies, June 1944 (2013) which proved hard to get through with the numerous lists of various units of both sides. Conversely for my
Provision the complaint was that there was too much dialogue; too much character development (especially of women) and:
'Very boring if you are an alternative history fan. There is so much dialogue that has next to nothing related to the premise of the book-which had high promise. I find myself skipped 10's of pages to get to actual historical content. This guy is obsessed with Ireland and country settings. If you like military action don't buy it.'
The premise of the book is that the Allies are losing the War of the Atlantic and Britain is suffering starvation. It views it through the eyes of the members of one family. This apparently is not 'actual historical content' which clearly in the eyes of the reviewer has to be 'military action'. That is referenced, but only in news reports the way most people would have been aware of it; even those in he armed forces below general rank. Two of the characters are actually in the fighting: one an aircraft navigator; one an infantry officer, but the war is seen from the view of two men very close to particular dramatic incidents rather than anyone saying 'oh, yes, because we have been unable to get more than 40,000 US troops to England we are going to have to postpone D-Day until 1946 and so the Soviets will struggle to penetrate into pre-war Poland'. There are vocal readers out there who have very strict rules about what is 'real' alternate history and really it is simply campaign reports.
On the technical errors, it also cuts both ways. I remember when Ryan McCall's novel,
The Nanking War (2013) came out. It features the Americans going to war against Japan in 1937 and there were complaints on highly technical details. The one which riled me at the time and does to this day:
'McCall arms the U.S. Marines in Nanking War with magazine-fed Winchester rifles. In 1937, U.S. Marines assigned to China were issued Springfield 1903, bolt action rifles.'
Apparently it is fine for the USA to be involved in a war 4 years earlier than actually happened in our history, but it is unacceptable to think that marines might have been issued with a newer rifle - one which actually existed at the time. These people love to show their 'superiority' by setting rules that they feel alternate history authors trip over. This fixation with military manoeuvres and an unacceptance that there will be rippling changes in terms of weapons, let alone behaviour or impacts on the home front, has a horribly deadening effect on AH writing. I find myself pre-empting such criticisms with lengthy explanations in the historical notes about why I selected such a choice and why it was feasible, even if the reader will not permit it. I do wonder how many burgeoning AH authors have given up in the face of such criticism which masquerades as being about quality, but is more about someone who finds them unable to write fiction, putting others in what they feel is their 'proper place'.