I believe AI is the main reason why mining hash rate is falling in 2026, most miners might be shifting their resources for AI compute and that's why the mining hash rate might be falling. However, the miners who believe in Bitcoin long term value growth will keep their mining operations and will not shift toward AI sector but surely a good number of miners will shift because they'll get better profit in short term in AI sector.
Some miners switch not most.
Most would be 51% or more hash rate and 51% or more diff drop.
the Diff high was 155t
the diff now is 134t that is only 13.5% drop in hash not 51%
and price went down from 126 to 71 which is over 43% drop in price.
So hash is off a bit.
I estimate at least 1/2 of the 13.5% drop is Iran hash rate turned off by Iran maybe even destroyed by USA.
So that leaves 6.75% drop due to AI shifts and/or companies going bankrupt.
The breakdown of the 13.5 total drop may be
6.75% Iran
6.75% AI and companies shut down.
Many people do not realize a large power contract say 3 years 10 megawatts at 4 cents a kwatt can be transferred in some cases. So a mining plant does not refit it just sells it remains power contract off to an AI company.
Sorting
1) Iran 2) A.I. switch 3) bankruptcy
will be hard. But If Iran war continues for a while say till Sept 1 we will know better just how much is lost due to Iran