Are the 218, etc., still only 96K max (unless using MQA)?

From this point onwards, my feeling is that it would be an advantage for Meridian to be full Roon partners and have all their future endpoints fully Roon compatible, including RAAT, but in their defence, is one reason it's difficult for them to do so because legacy components (including all current networked components) would then be incompatible?

HC: 861v4/ID40/LPS, DSP5000, DSP5000VC, DSP3100, SW1600, HD621, Oppo BDP-105, Sony VPL-HW55ES
2-Channel: Oppo BDP-105, TEAC VRDS-7/Trichord Clock 3/PSU, 551, Quad 303, Harbeth Compact 7ES-3, Kimber cables, Russ Andrews mains and supports.
Previous Meridian: 5000C, 5200SL, 7200.2, 6000, 562V.2, 568.2mm, 800v4, 808.2i, 818v2/v3, 861v8, 502