It’s pretty rare these days for consumer electronics to have particularly useful manuals at all. Professional electronics are a different story, but it seems like consumer electronics companies have largely decided that their products are intuitive enough that people will just figure them out, that if you can’t figure it out you’ll just search online, or that most people wouldn’t bother reading one anyway.
It’s sad, even graphing calculators come without physical instruction manuals. They still exist, thankfully, but only as PDFs that you have to go online and download. I got my first one back in the 90’s and it shipped with a 300+ page manual (in only English, at that) which not only explained every single feature and function of the calculator, it also provided tons of useful examples and tutorials.
