I keep going back to the thought that "the most focus you'll ever have" on something is when it first grabs you.
I've had a number of items left as unread in Reader, a number of notes left unfinished, a number of tabs left open, all just waiting for me to return to them and write something.
Two years ago, Drew Coffman wrote that notes can be a graveyard for your thoughts, written down then lost. I remarked that it felt my blog could be like this: "that I'm not doing enough with what I've got, making do instead of making strides."
If that is the case, if it is a graveyard, then I want to speak to the dead, build on their ideas. (And by 'the dead' I mean past instances of me who thought something was worth linking to or writing about.) That's why I've made all the recent changes to the site. Reader, Start, it's all about extending blogging, getting more from it, hopefully doing more with it by creating pathways through my thoughts over time.
Tom Critchlow wrote about increasing the surface area of blogging; he was talking about blogging as a whole but it can equally apply to a single blog. Creating a larger surface area allows for more scope, more references, more links, more connections – with some work and a bit of luck that leads to more ideas. Critchlow wrote:

"I think there’s something quietly radical about making your feed reader open by default. It increases the surface area of RSS so others can discover content more easily. It makes blogging more visible."

That's true but, in a setup like mine, it also allows for easier consumption and reuse.

The desire to turn the blog into a database, rather than just be held in one, has been long standing, five years at least. My interest was, therefore, piqued when CJ Eller quoted Justin Murphy's post Personal Knowledge Management is Bullshit. Murphy argues that having an ever expanding dataset is "oppressive not impressive. It’s not useful, and it’s not illuminating."

"Individuals blessed with high degrees of industriousness and orderliness will build sophisticated media diets, note-taking systems, and automated archiving pipelines much more effectively than those less blessed with these traits."

Then they try to sell these systems to the rest of us.
I am definitely more of the latter, the 'less blessed' and always have been; organisation has never been a strength. To that end, I've always been a bad curator. Start is an attempt at improving things, taking them out of my hands to a degree, with a minimum of effort.
It seems a waste to have years of material, of my personal history, sat there for its own sake rather than be able to take advantage of the potential held within. But Eller likens PKM to a garbage heap, "a perpetually expanding web of hyperlinked notes" asking how we can prevent one from developing and save ourselves from such a fate.
Maybe the answer is simply to be selective.
For various reasons, I have been very bad at feeding the machine, very few posts have been marked with labels that would place them within my system. Maybe that's a good thing. By being slow to add items I am preventing an unwieldy build up. I originally intended to throw all sorts in but find that something really has to resonate before it gets labelled.
I also feel that integration is key.
Having tried a wiki-like system in the Garden I decided it was better to have any form of PKM as integral to the blog, directly fed by it rather than as a separate repository. Thoughts and ideas are posted once to the blog, why duplicate the effort? I don't want it to be what most would consider a traditional PKM system. Yes, there are bi-directional links in some cases and, between posts, I have the ability to indicate these links, but there are few. Instead, I mainly rely on internal webmentions to indicate related posts. Start deals more with mini-hierarchies originating from individual starting points, threads rather than a web.
Perhaps the blog is finally ready to be the "digital public commonplace book" or thought space alluded to by Chris Aldrich almost two and a half years ago.
Past, present and future me are in a far better position to communicate across the years than ever without having to shoulder too heavy a burden, or continually sort through (and possibly dispose of) a garbage heap. The blog exists in its own right, and will continue to do so for years to come. Everything needed is held within and I now have a way to unlock it.
What could be easier than that?