Perhaps you too get the feeling that the world is becoming increasingly complex. You're not wrong as far as usage habits with respect to technical documentation are concerned. Thirty years ago, customers were happy when their device came with a user manual in the form of a hectographed script; later, they wanted professionally printed instructions, then a PDF, then instructions in HTML 5 and, of course, the whole thing in the form of data in the online store too.
And now? Now, there's virtually everything. Video instructions, mobile applications, augmented reality… but PDF or printed documents are still required for legal reasons. The world of technical documentation is in fact becoming more and more complex.
Fortunately, there are things to make technical writing easier, such as a component content management system (CCMS) like SCHEMA ST4.