One of the biggest mistakes to change the #bitcoin network was, that you need an asic mining device to mine #bitcoin.
Huge step to centralization...
Discussion
There should be more covert mining options (maybe there is and I don't know them). Many thousands of us could participate even with tiny additions to the hashrate.
And yet it doesn't change the truth of my statement.
It was not a change but an evolution. I don't see another way it could have gone.