When an Astartes with bionic replacement and enhancements dies, are those bionics retrieved or interred with said battle brother?

And what of those heroes encased in dreadnoughts? They may well posess valuable bionics which will now provide little direct benefit to them. Do they keep those?

I can see arguments for leaving (not desecrating the honoured dead) and removing (valuable technology that would be a sin to allow rot). Is there background or existing arguments to support either position?

when you die, your Cyb was returned to the chapter.

if you are entombed in a dread...you don't need cyb. the dread was now all you need to combat and to survive...

cheers

I'll just say it up-front: my post is going to contain a minor spoiler for Dawn of War II.

If a Marine with bionics falls in battle and the cybernetics are intact enough to salvage, then yes, they are harvested.

As far as Dreadnoughts go, it depends. For example, in Dawn of War II, when a certain commander is interred in a dreadnought, he keeps his targeter implant. You can still see it through the Dread's viewport in certain scenes.

only cosmetic.....

look at page 183 of Rites of battle...

The sophisticated sensor arrays built into a Dreadnought
mean that the pilot within always counts as benefi ting
from the Auto-senses of a Space Marine helmet, an
Auspex with a range of 500 metres, an Astartes Targeter,
and an inbuilt Vox Caster.

I'm also assuming it was a targeter. I really don't know; it was just a big bionic implant affixed over his right eye; looked a bit big even by 40k standards to be a bionic eye, so I'm assuming targeter.

Battlefield logistics demand removing bionics from the dead. You take their gene seed, their armor, their weapons. Why not their revered bionics, that they may be put to further use smiting the enemies of Man?

Extracted bionics looks like the favoured option with the better arguments.

The Imperium honours the dead, but it's also brutally utilitarian. Tech is rare and valuable, so my vote goes for reusing the bionics of the dead, too.