Perhaps it's just me, but I find comments (principally on Stack Overflow) that are only "Don't use X", "Stop using X", or "Switch to using Y" non-answer. Particularly when they correspond to programming libraries or shells, as it may not be a viable alternative to the OP's implementation. I have reviewed numerous comment etiquette related posts , , , and numerous unrelated ones, and haven't found any direct advice. Likewise, the FAQs on the subject don't address the issue that I have found.
I would welcome any advice on appropriate responses and actions.