Tech world is ever changing, evolving into sometime completely different things. This is madness. How could someone catch up to almost everything?
Once you did good with Eclipse and Android plugin to do some stuff with your phones. Everything went smoothly until the cross platform framework such as Phonegap came down from heaven. Even better, Google created material design and decided to stop its support for Eclipse and changed it IDE to IntelliJ-based Android Studio. Not only that, Xamarin, React, Angular, and more of web tech are coming to mobile platform. Talk to me, iPhone developers.
That is one software development. You do realize you have more than one interest, ja? Wie ist deine Sprache?
Seriously, you need to document, to write what you’ve learned so far, your never ending journey in following, learning, understanding, developing, and maintaining those materials you read and learn from. Otherwise, you would soon forget how to do this and that in time of need.
Thus, journal page is about to be born.