Are the 218, etc., still only 96K max (unless using MQA)?
Via the Sooloos LAN interface, unfortunately yes.
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, ...
Agreed.
... 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?
Compatibility and migrations issue are real but they can be mitigated:
Current Products218This is a new device so no excuses ... its hardware should have been specified to be able to support both protocols.
(I'm not say it has or has not, just that it should have.)
ID41 (ID40)From what I understand the hardware on these cards is not up to running the RAAT protocol stack.
However, M could produce an ID42 card that supports RAAT (or possibly duel protocol RAAT and Sooloos).
MS200I suspect a replacement for this is in order one that support MQA decoding and RAAT. That might be the 218 but many will feel the 218 is overkill as a MS200 straight replacement.
MC200I don't see M replacing this with a new version, but it should be possible to support RAAT on its hardware.
Sooloos Core on QNAPRoon can run on QNAP so no reason why Sooloos could not be enhanced support RAAT on this platform.
Legacy ProductsMS600Trade in against 218? Maybe but the 218 is missing the balanced analogue outputs.
C15It's Windows XP based, I think Sooloos running on it could be updated to support RAAT. However, I don't see M investing as it out of production now and quite dated.
I'm sure to have missed out devices, but similar options/arguments would apply. If there is a will there is way.
Regards,
Carl