Its my first potential dollars on platform after about 50+ posts. I agree with what you said. But if you didn't know it takes 2 years for your SP to power down as far as i know. My mind created for me interesting blog where I look at powering down of powerhouses and its implications. Those are just theoretical ramblings but its on my mind now.
https://steemit.com/seemit/@leksimus/so-the-question-is-what-happens-if-powerhouse-with-1-000-000-sp-powers-down
Feel free to take a look.