Author here. Thanks for the feedback. I agree that what I've done is nothing revolutionary, but the vast majority of websites out there don't have these sort of thing.
That's one of the reasons why the average page weight continues to grow every year [0].
Moreover, this solution is good enough for people with small blogs just like mine. Anyone who needs something more involved can use your service or other alternatives.
As for responsive images, I implemented that on my site too although I didn't mention it in the article. I plan to write a follow up article on that topic soon.
On a side note, you might want to bump up the font size of the navigation links on your site. They're too faint.
Totally agree with the page weight and that we're missing something.
Increasing page weight when we're also increasing connection speeds is only bad when the first one increases more rapidly, and I believe that we're under that situation.
Would love to connect to chat about this and for sure I'll read the follow-up article.
Moreover, this solution is good enough for people with small blogs just like mine. Anyone who needs something more involved can use your service or other alternatives.
As for responsive images, I implemented that on my site too although I didn't mention it in the article. I plan to write a follow up article on that topic soon.
On a side note, you might want to bump up the font size of the navigation links on your site. They're too faint.
[0]: http://idlewords.com/talks/website_obesity.htm