From a non-miner perspective, the adjustments to difficulty do not seem to be very great, significant or material, even if miners are reporting on the ground that these kinds of adjustments have a lot of meaningful impact on their own profitability - coupled with short-term UPpity BTC price moves?
The profitability margin in mining is very tiny, 5% in either direction makes all the difference between winning and losing, thousands of mining gears shut-down with a tiny increase in difficulty because their gears become no longer profitable.
One more thing is that a difficulty drop of 5% isn't just 5% more profit, it could be a lot more than that, and here is the math the most people aren't aware of:
Let's take the average miner who pays 5 cents per Khw and see how the next 10% drop in difficulty will make him A LOT more profitable.
Currently, T17 makes $4.53, pays $3.02 for power and NET profit is $1.51
With a 10% drop (ignoring price factor since it can go either way) it will make $4.98, pays the same $3.02 for power, and nets $1.96 in profit which isn't just 10% more profit by any means, it's almost 30% more
net profit ($1.51 vs 1.96$)
So a -5% in difficulty isn't just 5% more BTC and it gets even better for the guys who pay 6-7 cents, even much better for those who have less efficient gears than the T17.