I have a Surface Pro 4 (I think from 2015) and the battery life now is awful. I might be able to get an hour or two depending on the performance mode, I usually just plug it in while using it now. If I forget to plug it in between uses, it will definitely be dead the next time I go to use it.
Plus it’s starting to feel pretty slow. I do still have Windows on it, perhaps installing Linux would help make it faster but it sounds like it takes some work to get everything working properly so I haven’t bothered.
The professor that taught my algorithms & data structures course said if we were going to keep one book it should be the one for that course. I followed that advice and it’s the one textbook I still have. It’s been 8 years since graduation and I haven’t opened it once. I tend to just read Wikipedia if I need to understand a particular algorithm or data structure.