My understanding is that I'll keep my credit history since everything moved over (credit limit, past statements, etc) when I go to my new account. Other posters here have said something similar; I would assume its just like if your card had fraudulent activity and the number changed but the credit history remained.

No sign up bonus, which they mentioned during the disclosure the agent had to read to me before I could move forward. And I do have access to the rewards section in the chase portal where I see the new earnings structure.

My physical card should arrive no later than mid next week (5-7 business days I believe). I timed the change during a break in travel just in case it caused issues with my club access.