Pre-internet ways failed to teach language super often. Very frequent issue when learning from book was that you could not not understand anything people say, because you imagined the language to sound much differently then it does for months and months while learning. That was the most common result of language learning attempts - not much.
Language learning is one of the things that were genuinely made much more effective by the internet and streaming services. The input based learning methods were basically impossible pre-internet for most people. And these are very effective.
Many language learning books used to come with audio media. I'm old enough to own a few that came with cassette tapes.
Books are still worthwhile IMO, if only because they provide a bit of structure to one's learning. With free resources it's way too easy to become paralyzed by choice.
I am old enough to remember them. Comparably, you got maybe 4 hours of media - meaning sentences from the book being read and short boring dialogs. You cant compare it to what is currently available. It is like comparing a puddle of mud to Atlantic Ocean. And I mean it in a positive way - those audio tapes were almost nothing comparably.
Beyond projects like Dreaming Spanish, you have around infinite amount of French, Italian, Spanish or German Youtube about whatever topic you want to. There are even dedicated playlists for total beginners you can start to consume with zero knowledge. You have thousands of shows on Netflix in foreign language with various difficulty - some actually suitable for beginners. Some you have already seen in own language, so you can understand them more easily.
For major languages, there are dozens if not hundreds of podcasts with simplified news, "for beginner" discussions. Some of them are useable with literally miniscule amount of knowledge.
Language learning is one of the things that were genuinely made much more effective by the internet and streaming services. The input based learning methods were basically impossible pre-internet for most people. And these are very effective.