I thought I'd repeat this anecdote I previously posted on a discussion about libraries a while ago.
A few years ago I was researching the Swiss architect Le Corbusier. I wanted to find out about his famous housing complex called Unité d'habitation (Housing Unit) first built in Marseille in France. I started my research online looking for floorplans and commentary or critques. I found very little (there is a lot more available online today, but not when I was looking).
Consider that Le Corbusier is one of the most famous architects of the 20th century so this was a surprise. Eventually, I did find what I was looking for by going to the library and visiting an architecture exhibition. The point of all this is that we assume everything is mostly online and so it's our first port of call for any research or knowledge gathering. But there is a huge amount of information and knowledge found in books that have never made it online. If you never go to the library, you simply won't realise what you're missing.