"Client-side" has become one of those phrases that gets said with total confidence and about 60% accuracy. Here are nine things I've heard — said some of them myself — that sound right until you actually test them.
"It's more private because it's client-side."
Sure, if nothing else on the page is calling out to a third-party script, an analytics pixel, or a CDN-hosted library that phones home. "Runs in the browser" and "sends nothing anywhere" are not the same claim, and a lot of client-side tools quietly do both without realizing it.
"No server means no cost."
No compute cost, sure. Still paying for hosting, bandwidth on every asset, and the CDN serving your now-much-larger JS bundle to every single visitor whether they use the feature or not.
