Rf noise from m scaler into Dave and tt2 is way too much blown out of proportion. Imo more transparent is your system more revealing it is for rf noise level changes. It is not the fault of chord equipments, it's just the transparency of Dave and tt2 which reveals even the tiniest changes. If you go solely by measurements, you won't see the effect of rf noise.
While my experience with RF noise at home is similar to yours: the more transparent my system gets, the more I notice subtle RF noise issues, having hung out at various dealers and seen different brands of music server products in action, I would say yours and my experience are not representative of the overall complexity of system synergy issues relating to RF noise.
Part of the problem is that some dealers are oblivious to such issues as they're just trying to sell stuff and setup demos quick so I've seen some dealers not notice that one speaker's polarity is wrong, the left-right channels are switched or they turned on the left subwoofer but not the right or that the left speaker is clearly closer to primary listening position compared to the right speaker. So those dealers would never pay attention to RF noise issues affecting Chord DAC performance. Worst I saw was a Chord Hugo 2 feeding a Naim integrated amp that has its own internal ADC for all analog inputs so essentially, I was listening to the Naim DAC and no the Hugo 2.
And then, power products and accessories from power cords to power conditioners probably have a much higher profit margin than most audio components or speakers so dealers sometimes like to plug in as many of them as possible to sell these products but sometimes too much of a good thing means increasing ground loop RF noise. Unfortunately, loyal customers see the dealer is doing this so they try to duplicate this at home.
But the worst offender I think is that some "audiophile" music streamers and servers actually truly generate a lot more RF noise than our modern desktops. I have definitely heard a branded audiophile product (not one that we usually discuss here but still relatively well reviewed) generate so much RF noise, I can totally see how some people can say Chord DACs just sound like other DACs having listened to this specific streamer/server feed Chord DAVE vs another DAC chip DAC. I managed to convince the dealer to switch to Toslink when using that specific server/streamer for Chord DACs.
So on one hand, like you, I do believe for most owners of Chord DACs, the RF noise issue is overblown. But without knowing their entire system from their networking, power treatment, connection scheme and products in use, it is difficult to actually know whether an individual Chord owner is having significant issues from RF noise into their DACs.
As to whether the RF noise issue is Chord's responsibility, in general no. But ultimately, we now live in a world where most of our products are there to solve user issues. Our phones and laptops are designed to be user friendly so that we don't have to bend over backwards to make them work for us. Heck, I just got a toothbrush that tracks whether I'm brushing my teeth hard enough and shows me the exact duration of toothbrushing to optimize my dental hygiene. So it is not surprising that customers buy a new Chord product and expect it to do everything they want it to do. They don't want to come to terms with the fact that their convoluted streaming setup or power conditioning system is generating a lot of RF noise into their Chord DACs. So instead, they want Chord to take care of the incoming RF noise for them.
