Some of it seemed new to me. The reductio argument is new; the list of reasons not to move is new; the proposal for a startup founder visa is new; the comparison of SV and Boston investors is new, and particularly the simple explanation of the latter's conservatism; the point that startup hubs are markets is new, and in fact only occurred to me for the first time in the middle of writing this.
Nobody likes moving, so this is an issue that people are going to grumble about no matter how sound the advice is, or how often it is repeated.