I wrote a post in response to Costolo stepping down. Since the trendy thing is to post punditry about Twitter, I couldn't help but chime in.

"On Twitter" - http://blog.higg.im/2015/06/12/on-twitter/

----------

Also, you can make up your own mind about this:

http://www.vox.com/2015/6/11/8761731/twitter-trouble-faceboo...

http://lowercasecapital.com/2015/06/03/what-twitter-can-be-2...

https://medium.com/@michaeledwards/re-imaging-twitter-ea4e11...

http://www.novaspivack.com/uncategorized/why-twitters-engage...

https://alexgaynor.net/2014/oct/30/i-hope-twitter-goes-away/

http://blog.higg.im/twitters-self-immolation/

http://john.do/twitter-quit/

http://techcrunch.com/2015/02/22/twitters-dilemma/

http://www.theatlantic.com/technology/archive/2014/04/a-eulo...

http://www.mathewingram.com/work/2015/04/30/twitters-multi-b...