Using iburst and pools

[Steve Bourland]

Yo Gary!
  Hope you are well during this chaos, reading the mailing list brought up 
a couple questions:

>  And I've complained about the iburst before.  As well as using the 
pool.

Can you (easier than me Googling it) point me to the discussion?  I think 
I understand the iburst, but what's bad about using pool servers? 
Thinking it's a case where when you start (and look up the IP), you may 
get pointed to a server that drops out of the pool later?  Is that any 
different than any server that may drop out later?  Is there an 
expectation that servers will drop out of the pools?  Just curious, if you 
don't have time right now, no worries.
                                        Thanks,
                                          Steve