Interestingly all three devices mentioned in the original post are USB . If I had to guess Meridian tech support was spending the vast majority of their time and resources troubleshooting USB and driver issues that really by and large were caused by the end users computers. It was probably not a hard decision to discontinue items that were such as strain on resources. One hour of tech support on a $200.00 Explorer 2 puts you upside down really quickly.

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One step from the Presidency
#1 Trinnov Altitude 32-8-16, 271, 8000XE, 7200SEHC, 7200.2, Seaton F18, JL Fathom F113, Revel w990's, Kef R7, ATI 528 Amp, JVC RS4100K, SI screen. Roon Nucleus+, Eno AG, Eno M link, 218.
#2 Mark Levinson No5105, Ayre VX8 and CX8, Vandersteen Treo CT, Preamp varies.
#3 Meridian Ellipse