> it depends entirely on what you want from it
The biggest appeal of twitter for me is being able to get insights into the technologies of my interest from the very people that develop and maintain them. Many of those developers, however, do not have the time or willingness to run a blog. And twitter, due to its short and straightforward format, is where they can easily engage in discussions and express opinions, from which I, the lurker, can extract applicable knowledge. The down side is that the same twitter format encourages the quantity-over-quality attitude, which results in me, the lurker, having to dig through layers of idle talk, announcements, and retweets.
> the shorter the format the worse it gets
I tried looking into longer-format platforms, namely medium, but much of the content there is either surface-level or does not instill confidence in its credibility.
Anyway, thanks for the great reply, it has certainly helped me build a clearer picture of what to expect, should I decide to join twitter. I guess, I should just stick to HN without needlessly dispersing my focus.