doc: wrote about tradeoff for undo functionality in README.md

README.md

@@ -56,6 +56,16 @@
 
 ---
 
+## Trade Offs
+
+#### Undo Tree vs. Undo Stack
+
+While the undo tree method that vim uses is powerful, I rarely find myself using it. A stack terminal-based
+approach is more natural to "non-vim" users and much simpler to implement. Implementing a feature similar
+to Vims undo tree would many times longer than a simple stack.
+
+---
+
 ## 🎯 Features
 
 ### 🎭 Six Editor Modes