>>13320887>they look cool on your shelfConsooming useless crap you could get a better version of for free just because buying shit makes you feel good isn't good reasoning.
>using a real book is usually a lot more comfier than using a book on a computerSubjective, although I happen to agree. I struggle to focus while reading on a computer because I keep tabbing out.
I use an ereader. Decent-quality ereaders blow real books out of the water in 2021. You get the visual comfort of text that looks better than most printed books and the easier focus of not being in a web browser, along with something which is lighter than all but the tiniest textbooks and contains all your books at once, the ability to use pdfs, and the ability to search and endlessly annotate/erase without destroying or cluttering your copy.
There's also the fact that mathematics publishers, especially Springer, do not even slightly care about the physical market anymore. They assume you are going to read the digital copy and they design for that. The physical copy is objectively worse a lot of the time (anything with dense-ink diagrams more complicated than lines looks like shit in physical books because the paper/ink quality is not high enough to print the same quality you see on a screen).