Standing room is sold only when the show is sold-out or nearly sold-out. The view from SRO is, IMO, better. They don't sell them until all rush tickets are sold. My last experience (a month ago) they also sold any remaining partial view seats at rush prices, then sold SRO.
A Chorus Line revival played its final Broadway performance on August 17, 2008. The tour played its final performance on August 21, 2011. A new non-equity tour started in October 2012 played its final performance on March 23, 2013. Another non-equity tour launched on January 20, 2018. The tour ended its US run in Kansas City and then toured throughout Japan August & September 2018.