The default window size shows like 1-1/2 sentences. In other programs (like JetBrains IDE), most of the changelog is visible in the update prompt.
This requires either a lot of scrolling to be hardly readable, or expanding the window immensely.
Considering every time I try to push changes on a branch, the push window is tiny and I need to scroll to see if my branch is even selected (which needs to be done manually on a new branch for some reason), my guess is every time I get an update prompt window, I'll need to massively expand it to make it readable.
You can do better, Atlassian. Maybe try focusing more on the customers than the shareholders 🤔