You can calculate it !
Take your power usage and compute the cost over a year.
I will soon add a SSD because i finally moved from a RAID 1 to RAID 5 (so more HDDs), it consume more electricity.
I can measure how much power it draw because the server is on a smart plug. I calculated an additional 20-30€ a year of electricity, adding a SSD for read/write cache would allow the HDDs to stop spinning, make things faster and will be cost effective over a few years.

Consider that a new power efficient CPU may be cheaper by consuming less electricity over a few years!

I contributed a feature to the .NET JIT without knowing C++.
I really dont know C++, I have at most wrote 300 lines while following a tutorial 6 years ago.

Contributing to big project can earn you more recognition than doing little project from scratch.
You know JS ? Contribute to some libs.
Found a bug in chrome ? Report the bug, learn a bit of C++, and submit a patch to fix it.

Gor acquired and rised price.

A horse carriage is very loud on pavement.
Also lots of horseshit everywhere.

Car with horse existed when theses road were designed.
It’s even a paved road, I find it a bit sad they tore down the pavement. There is even a photo somewhere on internet where you can see a dead horse with kids playing next to it as car pass by.

Exemple of a photo 100year ago in Paris:

Pedestrian can walk on pavement.

I’d like to remind that cars were banned in center of Rome, because there was too much cars.
And I’m talking about the Rome of 2000 years ago.