What do I need in an IDE?

This is my list collected:
# 1. Editor
# 2. auto save
# 3. Syntax Highlighting
# 4. Code Completion
# 5. Terminal
# 6. Browse on function
# 7. shortcuts for editing
# 8. line numbers
# 9. file explorer
# 10. find all references of a function/method/procedure
# 11. automatic testing
# 12. debugging
# 13. a.i interface (github copilot e.g.)
# 14. REPL
# 15. see all functions in file (function explorer)
# 16. undo capability
# 17. search function code

Видео What do I need in an IDE? канала satisperfectum