XLR seems a bit oversized a connector for 2024, particularly if it means RCA only for subs (contradiction in terms for this brand at this price level).
Couldn't they make an XLR Jr type connector to save space on the back panel like Mini-DSP and Monoprice do for a plethora of connections (bare wire terminal blocks only instead of huge banana or spade connectors)? Even Toslink made a tiny version for MD portables and the like. Or as someone suggested above, a different balanced connector with an adapter (RCA users will need adapters or hybrid cables anyway).
Frankly, at that price level (shades of Lexicon MC-1/MC-8), I would have expected Auro-3D and IMAX Enhanced just because. But I gather while Lexicon was more about high-end functionality over form (Logic 7, THX, DSP, etc), Macintosh has always been more about vintage name cachet and the cool looking green nameplate (shrug).
If only their tube amps glowed green (I would have used custom green glass filtered tubes or some kind of green colored glass filter cover over the tube area (with ventilation) to get the effect, personally.