Some comments after a few days using Pie:
- First two days the phone drained battery like mad (I'm guessing background updates, recompiling of apps, internal reorganization, data indexing, whatever it did...)
- After that, it lasts quite a lot, I think even better than before the update !
- No observed slowdown or increase in speed
- I like the more joyful, colorful interface ! They certainly passed beyond the "monochrome fad" that swept the internet in the past few years.
- Bixby is more intrusive, it cannot be fully disabled anymore (just switched from single-click to double-click).
- Clock on the left side is nice, I'm starting to like it. Much easier to see the time. I'm guessing this was done because of the S10/S10+ with the punch-holes...
- Notification system is better and allows more interaction
- "Phone" app interface is improved, with everything accessible under a tab (keypad, recents, contacts, places), and is also more colorful, allowing quicker identification of contacts by simply glancing at the icon (letter + color) instead of heaving to read the entire name
- Recent apps with the flat 2D interface is more practical
So far I like this new update !
Good job Google and Samsung !