Missing from your timeline: 2006-05-01 NIST SP 800-57 Part 1 Rev. 1 is published, which recommends to stop using 1024-bit DSA by 2010. 2010 passes, but O

Missing from your timeline: 2006-05-01 NIST SP 800-57 Part 1 Rev. 1 is published, which recommends to stop using 1024-bit DSA by 2010. 2010 passes, but OpenSSH never added support for DSA with keylengths larger than 1024-bit. 2015-08-11 OpenSSH 7 disables DSA at runtime. The new announcement is just removing the config option to re-enable the algorithm. Hopefully most people stuck on DSA already starting migrating in 2015 (ideally: finished migration before 2010).