Being able to customize the "Allow custom values" option in the "Radio Select" field settings, to using as an "Other" response field would help bring clarity to the form question, and save time will building forms.

Here is an Example of what I'm referring to: https://www.loom.com/share/2fe06efb8f3547818ad7caf33ee4ff71?sid=6754d683-1add-415c-827c-00031d251218