How to script bulk track removal in KiCad for major PCB revisions?
Scripting bulk track removal in KiCad is effective for undertaking major PCB revisions. The provided Python script facilitates this by deleting all tracks on the board, allowing for a fresh start in the routing process:

```python
import pcbnew

board = pcbnew.GetBoard()
for t in board.GetTracks():
    board.Delete(t)

pcbnew.Refresh()
```

This approach is beneficial for redesigning PCBs where the current routing no longer meets the design requirements, or in cases where starting over is more practical than adjusting the existing layout.