Google Pixel 4, Pixel 3 or Pixel 3A: Should you upgrade?

Photo by Vjeran Pavic / The Verge Google’s Pixel 4 and 4 XL are here at last, after a mountain of leaks. Preorders are beginning today, and the actual phones ship in just over a week. So let’s assume your heart is set on a new Pixel phone, and you’re not willing to wait for the reviews. Should you upgrade based on specs alone? And if so, to which?
The choice isn’t quite as easy as “big” or “small” because Google’s new phones are expensive, a