Sapling looks quite cool! I've used git extensively in my career and consider myself as having a slightly-more-advanced-than-typical understanding of how to use it just based on conversations with colleagues. However, one thing that's always been very limiting with git has been stack-based PR reviews, and as they mentioned amending deep commits. It's not impossible, but it makes it awkward enough that I usually avoid it if possible.

Curious if anyone has used Sapling after lots of time using git. Is it the future?

Meta's Sapling (1) is definitely one of them. But there is also `jj` (2) and `git-branchless` (3). These tools target a smaller set of workflow where there is 1 main branch inside a big repo and everything else are short-lived branch/topic that could be treated as ephemeral stack of patches, constantly being uproot / rebase on top of the main branch to derive final result.

If that's the workflow you use daily, then you should give these tools a try.

(1): https://github.com/facebook/sapling (2): https://github.com/martinvonz/jj/ (3): https://github.com/arxanas/git-branchless