I agree with your assessment, but for me it is a message from the programmer to the reader. Hey this value will not be re-assigned during the following scope bl

I agree with your assessment, but for me it is a message from the programmer to the reader. Hey this value will not be re-assigned during the following scope block. If I see a let, I know I must be careful. Of course this doesn't apply to properties of objects ... which is a pity!