Why does the Flask debug configuration uses "--no-reload" by default?

[abceleung]

Currently --no-reload is the default Flask debug behavior. I can manually remove the argument and hot reload works again, so far I did not observe any issue. What is the rationale of setting --no-reload by default?

Steps to reproduce:

1. Create a virtual environment and install Flask
2. Create a minimal app.py:

from flask import Flask

app = Flask(__name__)

@app.route("/")
def hello_world():
    return "<p>Hello, World!</p>"

3. Launch the Flask application with VSCode default debug config:

{
  // Use IntelliSense to learn about possible attributes.
  // Hover to view descriptions of existing attributes.
  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Python Debugger: Flask",
      "type": "debugpy",
      "request": "launch",
      "module": "flask",
      "env": {
        "FLASK_APP": "app.py",
        "FLASK_DEBUG": "1"
      },
      "args": ["run", "--no-debugger", "--no-reload"],
      "jinja": true,
      "autoStartBrowser": false
    }
  ]
}

4. Modify app.py and observe that there is no hot reload
5. Delete "--no-reload" from the debug config file and the debugger starts hot reloading without issue