What benefits or features do this 218 software upgrade brings?

Originally Posted by Meridian Audio support page for the 218"
Any 218s used within Sooloos systems will receive this software update automatically as part of a general Sooloos software update
How do you get the upgrade now, since the Sooloos is not supported any more?

218, AC12, DSP6000 24/96LR, 4K AppleTV, Sony blu-ray player (BDP S570) and
QNAP TS-251 and a Mac Book Pro (mid 2012), an Intel Nuc8ieBEH
Technics SP10MK2 with Technics EPA100MK2 tone arm and PS Audio Phonolink Preamplfier