Those in the de-cluttering business talk about different classes of clutter. Aspirational clutter is that which you acquire to make yourself look better to either others or yourself. I tend to think of it as including unbuilt kits unrelated to the current project, books long unread or never read and perhaps magazines containing information you might need some day.
Sentimental clutter is that which you have an emotional attachment although it may be to the memories the object invokes rather than the object itself.
For me, a prime example of that combines some of both is old model railroad magazines. All have been read, sometimes many times but how much information do they contain that I will really ever use. Old modeling techniques are mostly obsolete but prototype drawings, for example, might be useful. But if I actually go to build something, I can obtain a reprint from either the publisher or the NMRA library. Intellectually, I cannot really justify keeping a couple of cubic yards of paper on the chance I might need a couple of pages out of the lot. Yet I still have them.
Or did. In a fit of ruthlessness or simple clarity, I have managed to bin most of the old magazines. My Toronto maximum sized recycling bin was not sufficient so I have lesser bins staged up for the pickup after next but the job is done.
Here is what is left with includes a few volumes kept for specific reasons but mostly special issues:
Featured on top is a BRMNA publication on Cuban sugar railroads I had forgotten I ever had. Thus highlighting another hazard of too much of something. I guess that might count as abundance clutter.
Here is the 2×4 foot rolling pallet the magazine collection occupied that is now off to make Christmas decoration storage a bit more convenient. The space it is in is the right hand end of the space for Comstock Road. The remaining two! pallets of non-hobby stuff will handily fit under the layout, one per support section. I am at last at the point where I can get back to layout itself.