[6f8986c3]

For secure applications, on-board wireless makes your life hell. I'm actually pretty happy they didn't.

[nousermane]

Depending on application and how you define "secure", you might find that having an easily sniffable SPI/SDIO/UART connection between main MCU and wifi chip can be a weakness.

[6f8986c3]

I believe the point is "no wifi whatsoever".

If you need wifi, by all means, go integrated. But not everybody does.