Vantaggi
If you can tie everything you do to the Amazon Leadership Principles, and communicate them all effectively to management, you will be fine.
Svantaggi
There is always more work than you can do. I worked in brand new tech. Ultimately, I left because I was a scapegoat when a major project didn't get completed that my L7 wanted to see completed. The engineer I was working with was a single point of failure and his manager prioritized the project, but the Engineer chose not to complete the project. I would do many things differently in hindsight. They offer a hefty severance package when you leave (I got about $20000 and a month of healthcare then COBRA) and coaching if you'd like to stay. I chose to leave because this project was losing battle. I was losing my mental and physical health because of the stress.