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Lego's 0.002mm specification and its implications for manufacturing (2025)

📝 Discussion Summary (Click to expand)

1. LEGO’s unmatched precision and backward‑compatibility
The thread repeatedly praises LEGO’s engineering:
- “More than just bricks fitting into each other at a superficial level, it matters how firmly they fit together, and it's one of the areas where LEGO is generally superior to the similar types of bricks.” – vidarh
- “Lego has stood the test of time. That's way harder.” – samrus
- “Backwards compatibility is something lost today. Incredible they've kept it this long.” – exabrial

These comments highlight that LEGO’s tight tolerances (≈10 µm) and consistent design allow pieces from the 1950s to snap with new bricks today.


2. The shift from generic, open‑ended sets to highly specialized licensed kits
Many users lament that modern LEGO focuses on one‑off, theme‑specific parts that are rarely reusable:
- “When I was a teenager, the trend had become sets with lots of specialised parts for one specific model.” – ralferoo
- “The sets became more literal and less open ended.” – detourdog
- “I think it's a dark age where they went from never doing anything out of the ordinary to SNOT for adult model sets only.” – bombcar

This trend is seen as eroding the creative freedom that defined LEGO’s early decades.


3. Pricing, value, and the perception of inflation
Participants discuss how LEGO’s price has risen relative to income and how licensing drives costs:
- “They’ve been around over 90 years and have been making plastic bricks since the 1950s and are arguably the most successful children’s building toy product in history.” – mproud
- “The price per piece is very misleading when comparing older and newer sets.” – brazzy
- “Lego has kept up with inflation.” – mytailorisrich

These remarks frame LEGO as a premium product whose cost is justified by brand, quality, and licensing, but also as a point of contention for families.


4. Alternatives and knock‑offs: quality, affordability, and competition
The discussion contrasts LEGO with other brands and the rise of Chinese clones:
- “The knockoffs are cheap but lower quality.” – brazzy
- “Some alternative brands are close in quality.” – em‑bee
- “The Chinese knockoffs are stomping them.” – georgefrowny

Users note that while knock‑offs can be cheaper, they often lack the consistency, durability, and brand trust that LEGO provides, yet they are increasingly viable for budget‑conscious builders.


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