Then explain the fire in the environment though. How can the game handle fire from a gun be impossible when fire on say, a wrecked rhino, already be in?

Hey look, a "what if" or "well they did this" comment. Also covered in the link provided.

Short answer: There are shortcuts you can take with static sources.
Long answer: learn about computer graphics (like me, it's super fun!)

It's never a "can't be done" issue, it's a "is it worth the effort and resources?" Resources being both during development and in the finished product for your computer.

It's just what I remember hearing from twitch. Granted it was a while ago but I personally haven't heard them change them mind, did they say they were gonna add flamers?

If so I would like to see Salamanders at some point also.

Flamers have always been planned, just not for launch because they're hard to do

Imagine this everything runs fine and dandy, your shoot people they shoot you game runs smooth. The second someone shoots a flamer you lose 5fps. no bigger game still running good. Now try about 8 people using them bye bye your entire performance. Space Hulk had the same issue. If you want an example of how a flamer works in UT4 engine use the flamer there. They didn't put it online because they ran into the same reason. I would love a flamer but I can't afford 3 GTX 1080 and the supporting hardware............

And if it is only a wave of flames instead of constant flames ? it could be possible ?

I can give you the benefit of the doubt cus I can't prove wave of a constant. Personally I would still stand by the same claim it would eat up performance. Maybe not as bad but it may be bad enough where they still would rather post pone it. I guess it would be a good question for the stream good sir!

Ill ask them so ! thank you

We need all 1st founder chapters.

AND

necrons (and DE, and SoB)

But Lamenters are pretty much gone and destroyed.

Though, second founding skins for the parent chapters ARE possibility from what Nathan said.