At first, audiobooks seemed like such an efficient use of time. But after finishing a couple of audiobooks on my walks, I felt that my brain and my ears always yearned for not listening to audiobooks and instead just wanted to enjoy the walk itself. Now I just walk. If I'm not feeling that well, I do put on some music for a while, but never an audiobook or a podcast.
On that note, I have decided to just read physical books. For all the inconveniences that reading a physical book has, I have felt that it makes reading more intentional. I can't just read anywhere or anytime I want. I have to now deliberately decide to read, even if it is way more inefficient. It lets my thoughts breath and settle. The purpose for me now is not to read as many books as possible, but to enjoy the books that I do read, and absorb them down to their core.