The rounding has a less significant impact than you’d think.
Interplanetary calculations of the highest precision will use just 15 decimals, which results in an error of about 1cm when calculating a circumference of 150 billion km.
But if you really want to measure even more accurately than that… The circumference of a circle with a diameter of 92 billion light years (as large as the known universe) can be calculated using 37 decimals of pi, and the result would be accurate within the width of a single hydrogen atom.
https://www.jpl.nasa.gov/edu/news/2016/3/16/how-many-decimals-of-pi-do-we-really-need/
I remember writing a comment about invasive advertising by Instagram. Just shared some anecdotes about how a few extremely specific conversation topics soon became the topic for the ads I was seeing on Instagram, and pointed out that if they were in fact using background conversation to target ads, it would be extremely easy to automate with the voice recognition technology available at the time, so why would they ignore the opportunity if targeted ads are their main source of revenue?
It became one of my most down voted comments at the time, and I had about twice as many replies as downvotes, claiming all kinds of wild or easily disproven shit to disprove the idea that Instagram used such tactics. Was very fishy