Longer pieces, for when the question is bigger than a setting.
The blog covers the things that need an argument rather than a figure: how to price printed parts for a customer without discovering at the end of the month that you lost money, why the same material warps on one machine and not another, and what a failed print genuinely costs once you count everything it consumed.
Where to start
The anchor piece works through a complete print cost from first principles — filament by real density, electricity at a stated rate against a metered wattage, a failure allowance derived from an actual failure rate, and machine time amortised over a realistic service life. It links out to the specific pages for each input, so you can disagree with any one of them without discarding the method.
After that, the posts split into two halves. One half is about money: pricing, failures, electricity, and the inputs people leave out. The other half is about the settings that move those numbers — layer height, infill, nozzle size, drying — and each one is written to answer "how much does this actually change the bill", not just "what does this setting do".
What these are not
They are not news, and they are not reviews. A post here has to still be worth reading in three years, which rules out anything pegged to a release cycle and rules in the parts of the subject that hold still: heat transfer, arithmetic, and the difference between a price and a cost.
That is the bias of everything here: prefer the thing that stays true.
A standing caveat
Every worked example in these posts is computed with the site's own calculators using stated inputs, and the inputs are stated so you can substitute your own. If an example's numbers do not match yours, the interesting part is usually which input differs — and that is nearly always either the density of the specific filament you loaded or the price you pay for electricity.
The recurring theme
Almost every post here comes back to the same observation: the expensive parts of 3D printing are the ones nobody measures. Filament is measured, because the slicer prints a number on the screen. Electricity, failure rate, machine wear and your own time mostly are not, and between them they can exceed the filament cost on a long print.
That is not an argument that printing is expensive. It is an argument for knowing which of the four is dominating your particular job, because that is the one worth attacking.
Corrections
Spotted a number that does not survive contact with your own meter or your own calipers? Send it over. Posts here quote the same material and printer records every other page reads from, which means one correction propagates rather than needing to be chased across the site — and the contact page goes to a person, not a form that files it.