Every so often folks ask me "do you still get nervous doing talks"
I have done hundreds of them, and used to be a voice coach and public speaking coach. So you think I'd be used to them by now.
Absolutely not - here is my heart rate data during a 20-minute talk that started at 9:15AM, audience ~600 people.
I brick it beforehand, then peak right as I step onto the stage. I have a Q&A which chills me out (the blue). Then I'm off-stage to chat to folks and answer followup questions.
I doubt this adrenaline response will ever go away. Just got to keep breathing through it.