Ask HN: Why did consumer 3D printing take so long to be invented?

"Today I saw an old paper printer, it has all the pieces for 3D printing except the plastic. Computer sends it data, it moves in 1D to print the image on paper using ink. A 3D printer is just 3 of these moving pieces from a paper printer with a melting plastic and thin pipe and software to connect it all.

All the pieces existed to make a working 3D printer existed even in 1970! and relatively cheaply. So why has it taken so long for [at home] 3D printing to actually become a thing?

Is it

6mo | Hacker news
Show HN: BemiDB – Postgres read replica optimized for analytics

Hi HN! We're Evgeny and Arjun, and we’re building a better way to do analytics with Postgres.

We love Postgres for its simplicity, power, and rich ecosystem. But engineers have to still get bogged down with heavyweight and expensive OLAP systems when connecting an analytics data stack.

Postgres is amazing at OLTP queries, but not for OLAP queries (large data scans and aggregations). Even in this case, we’ve still heard from countless scaling startups that they still try to use only a rea

6mo | Hacker news

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