Epub won the ebook standard and killed the rest, finally we had only one format to deal with. Do not make me wrong, pdf still there for paper scan and print, or graphic intensive book format. But for the battle for Amazon mobi and epub, epub won and be the standard most of the device in the planet accept and can be easy to deal with, cross platform, be it in the computer, web browser, tablet or smartphone, all will adapt the content based on the size, make it super handy to be use.
Unless you own the Amazon dedicated kindle, otherwise basically you do not deal with the mobi at all, or you can convert it into a single format for easy handling. How are your reading habits? For me I use the google playbook, as I light what i highlight or note taking automatically save as one google doc where i can edit or expand when i want to do so.
Once you get used to it, it is actually more productive than you deal with the print book, due to it already being in the digital form. For me, i actually found it reading much faster, in particular I can turn on dark mode for the night reading. Create bookmark or continue reading from where I stop from different device, it let the roaming from device to device without disruption and help me continue and resume from where I stop.
Disruptive innovation continues to be better than the previous, once you have the infrastructure and operation environment ready for it. Like for me, the computing device i use, internet and content in hand. Books are not dead yet, at least at this point of time, just not being the most productive means for the information sharing and fast value added and reprocessing in the digital speed. And the world now is living in the digital world speed, 24×7 non stop computing time. Next wave of change for sure will be in the digital, and the printed book industry will continue to decline further.
For a typical consumer in using the content in the book or ebook, what matters most is you adapt to it and use it and forge new habits. Once you get used to it, ebooks are not really that bad after all, you can digitally consume the content anywhere you want it.