Re: Some thoughts about "slow languages"
You have misstated Moore's law. Moore's law only says that the number of transistors doubles approx every 2 years. It say's nothing about performance.
Single threaded performance is probably increasing by about 5-10%/year. Most of the recent performance gains have come from adding more cores, and that is only useful if you have programming languages that can make use of the multiple cores well, and most programming languages don't.
So, your python program running on a machine today won't be significantly faster than running on a machine that is 10 years old.