If I were buying that item, I would remove the switch and bridge the connection closed. I am not even sure what the point is
The switch is handy if you've got something connected to the TX / RX pins and want to upload new code. Press the switch when the upload starts and you won't have to disconnect whatever is on TX/RX.
I'm not even sure if this is an official function, just a tip I got from a friend that has saved me lots of time.
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