Ah, I think there's a misunderstanding. I was talking about an Empire using Synth Ascension, and that your pre-acension robots (meaning synths") not(?) merge into your main species (meaning Synth Ascended pops) upon ascension. It isn't all that helpful that Synth Ascended main species and the last stage of assembled robots are both generally referred to as "synths".Wait, what? I don't think I've had a situation where different tiers of robots coexist in the same empire. The problem is with having umpteen species of your current robot tier that clutter the species tab, or as a machine empire, having robot pops (as opposed to machine pops) that you can't upgrade.
Yes you are right, and in fact robots magically mutate into droids or synths or even back to robots if they change ownership to an empire that has - or hasn't - the relevant technology. You can conquer another empire's planet with lots of Droids working CG industries, and end up with lots of unfilled jobs and unemployed Robots instead if you don't have the Droid tech yet!
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