Again, you don't know that. Personally I'm for the 6th ed lore and the grim dark approach so to speak in addition to this BUT that doesn't mean we're gonna have it in EC. The devs will have to tailor EVERYTHING including lore to fit the needs of the game. I'm not taking sides of old or new lore, I'm just pointing to a fact. Although I'd prefer everything as up to date as possible my priority and the devs I think as well is gameplay. What approach will they choose? I don't know.

I'm old enough to remember when 40k Chaos had Beastmen as troops. I just read enough of the novels to be accustomed to the newer fluff by now.

Yeah you know, there is some terrible fiction writing that counts of canon now a days, in some novels it's gotten to the point of making something up for a great story but as "lore" just generally sucks.

You'll notice that I said power armour is very very rarely made and marines are engineered to fit the armour? Once mentioned incident of one suit of power armour modification to fit one named character does not set a precedent for lore, lore is must be what is generally done, not what happens in special situations.

I remember a story where Ragnar Blackmane killed a Carnifex by thrusting a frag grenade in it's mouth. Does this mean that because it is "lore" that we should be able to use frag grenades as CC weapons and that a frag grenade should one shot a Carnifex?

I agree depending on the vehicle, I'm hoping more for locational damage on vehicle (destroy the main weapon, immobilise, destroy the vehicle) I wouldn't expect a lascannon to one shot a vehicle either, it would punch a very big hole in one though.

You see this is where you and me will always disagree, I'm an old TT player, to me Warhammer 40k is and will always be a TT game, the fluff is fluff, nice for a historical background and to flesh out the game, but to me it's the TT that does and always will define the game of 40k.

And there lies my point, if someone asks me "what is Warhammer 40k" it's a table top wargame based in the 40th century, with lots of lore and huge universe surrounding it, but it is a game.

My real first first connection wiith 40k was through the black library.
But eve through the written fluff you have to be able to differentiate between heroes and regular guys.

Therein lies the issue, there are about 1000 chapters (since the Horus heresy) of which 234 are named in codices and lore.

So lore for marines is about the average marine, even a few hundred examples of something different happening would make them the exception to the rule and can be ignored as lore.