Fortunately we have YouTube University and (for now) the Internet Archive, where hopefully current techniques won't be lost, but we'll just have to see how the future goes.

The privilege to use old timey techniques and then sell furniture on the basis that no power tools were used in the making of it is practically the definition of snobby, as if using power tools to make furniture lead to bad energy being imbued in the table that makes it unsuitable for being used as a table. You don't have to buy any furniture if you don't want it, especially if it's poorly made, but power tools don't automatically mean it's poorly made. You can make really shite furniture with hand tools just as much as with power tools.