We're discussing one right now. VSCode is an electron-based application, isn't overly-bloated, and starts up quickly. I switch between IJ and VSC every day and VSC is significantly faster, including startup. But, even if it _was_ slower on startup, that would be a tradeoff I'd be happy with if it was faster or more functional normally. I restart my computer maybe once a week, I'd be fine to wait another couple seconds.
I don't think there was some grand concerted effort to self-promote by the WDT guy, it's just a legitimately helpful and (at the time) novel technique for getting decently even flow when using cheap(er) home coffee grinders. It requires like 5 seconds of time and something like a toothpick or cake tester. This is not the same as the audiophile magic cables or whatever, the results are measurable and replicable by anyone with a toothpick and a home espresso setup.