My Arcam AV40 is at the service center getting the HDMI 2.1 upgrade. IMO it’s nice that Arcam began offering the upgrade to AV40 owners before shipping the AV41 and that all 7 HDMI inputs and 2 outputs are HDMI 2.1. It’s my understanding that AV41 is now in stock at some dealers and available to buy. I also own a Denon 3700, the one they had to ship an outboard box to fix.
I should be getting my AV40 upgraded in around 2 weeks time too.