Do not indulge in unnecessary talks that what others follow, then i should follow it. This will not make you right. i.e. if someone is not following standards of blogger community, then you have no right to break the rules. If you follows standards strictly, then google make you happy by giving appropriate credit for your work.
Reason behind My suggestions is that the future of your blogging carrier will not get abolished.
And the most important, what helps you to sustain in your niche is to be doing some unique work.
I was observing your niche since 2009, when i like to exploring things about blogging and the weird fact is that even the giants of your niche falls not only from their position, but also some of them are demolished too over time.
At last - I remained You, Now you are asking about those things which are out of center point of this topic, since you have asked for SEO of your Blog.Hence, we gave you suggestions.
One another Tip - Update Your Old Posts Regularly.