Exactly. "I use [x] all the time and know it well, so [x] will be a good filter for evaluating someone's technical skills." No. People do different work tasks

Exactly. "I use [x] all the time and know it well, so [x] will be a good filter for evaluating someone's technical skills." No. People do different work tasks depending on the project or company. Sometimes I'm knee-deep in SQL. Others in React. I'm often forced to do PHP. My familiarity with specific SQL syntax ebbs & flows with what I'm doing. There's no point in keeping something in your brain if you're not going to use it every day. Just remember the general concept and Google the specifics when you need it. Just one example why interviewing is terrible and interviewers really should be trained on what not to do.