Withdrawals have been disabled on Poloniex almost since the Hard fork 19. I bought a small amount of Steem on Poloniex and wanted to power it up shortly after the hard fork and deposits and withdraws were disabled. This has remained that way until today. I am happy to report that it's has been re enabled and hopefully the issues they were experiencing have been fixed. I did test it out with 2 small withdrawals and it worked perfectly for me.
Last night I also bought a small amount of Steem using Litecoin on the Steemit website directly and was surprised how easy it was. However due to the average block time it took about 4-5 minutes whereas a Steem transfer from Poloniex takes about 1-2 minutes. I did not test SBD withdrawals however noticed that is now also enabled on Poloniex.