Hello @lopw,
Thank you for submitting homework task 4 ! It was a really good read !

In November last year, Ethereum's mining difficulty and hashrate reached an all-time high. These indicators show that more people want to mine Ethereum.The most important reason more people turned to Ethereum mining was the increase in Ethereum mining revenue. The mining challenge is as more people / machines / devices turn to mining of any blockchain. Ethereum's mining difficulty is an indicator of competition among Ethereum miners.

I love the way you explained the mining difficulty. It gives a clear idea for anyone. This is the simple idea of mining difficulty. nice work. keep more good articles coming in future tasks too. [7]
Thank you