Can you imagine how much we would laugh if modern web browsers identified themselves to servers by all saying they were Mozilla browsers and referencing old technologies like Gecko?
Apply more scrutiny to the pop tech news sources you pay attention to and/or be more mindful of the takeaways that you read out of the information that is reported. This information is incorrect.
"The proof that you are wrong is obvious and left as an exercise for the reader" it no way to hold a discussion on a public forum, or anywhere.
And I say this as someone who knows that Gecko is constantly being updated and that Servo is a testing ground for new technologies that after being shown to be effective were migrated into Gecko.
Thanks for informing me, I'm surprised that it wouldn't be obvious that my "quote" is paraphrasing the tone of your message, but if it is confusing then I'll find other ways to express that.
Anyway, the burden of proof is on anyone who makes any claim in a debate. And you do make a claim:
> This information is incorrect.
... without any further explanation as to why that claim would be more correct than the claim by the person you disagree with.
Or put in other words: there is nothing in the comment that would be of any substantial help to a third person reading along who doesn't know anything about Gecko or Servo. Even if they were to believe that you were right they wouldn't know what the correct information is!
It's not an on/off switch; various parts from Servo have been integrated in Gecko, but it's not like it's "replaced".
It's like the old Greek philosophical riddle: "if you have a ship and replace one plank of wood, then is it still the same ship afterwards? And what if you replace all the planks of wood one-by-one?"
Gecko is a modern browser engine.