Neither Ady or his team have the funds for that level of SFX, so it's a moot point. Ady confirmed himself on the Facebook page that he could never afford anything of the sort. There's no use discussing it further unless one of you is an eccentric millionaire with their own pyrotechnics yard.
In which case, I'm both in awe and a bit scared.
VFX can work really well, with the bonus that you have more control over it.
Skip to 2:04 in the following video and you can see a digital effects breakdown of CG fire. Yes it's green fire in this one, but the principle is the same.