I agree. It creates grounding complexities where multiple circuits may (probably do) share the same ground for the property leading to unexpected interactions. Or just as bad, all with different grounds with multiple devices in the same system sending signal ground to different places. It’s a recipe for unintended consequences.
A simple dedicated CU with one just one circuit for the whole hifi with it’s own ground is the simplest, most effective, and most broadly valid in nearly all global electrical codes. There’s no need to have every plug socket for the hifi on it’s own circuit.
Option 1 is a simple ring circuit ( just in a compressed form ) A ring circuit can go to multiple rooms in a house before returning to the consumer unit . I’m my house my ring circuits of which there are 3 run on 4 mm t&e.
I only posted this on the Naim forum as my system is Naim specific .
This is my experience with individual radials to one piece of kit ( albeit with much greater distances to different room ) compared to ring and multi plug off.
Putting each bit of kit on its own radial emphasises mid range and upper frequency with perceived more detail.
Using a ring supplied system is better for timing and musicality ,with a loss of upper detail and less forward but with improved harmonics and timing .
In my situation I hoped to reap the benefits of both due to the closeness to consumer of the kit and the ultra short distances . But I was trying to tease out if the individual breakers add a different levels of bottleneck and hence pull each device slightly out of sync. The resistance through each breaker will probably be slightly different due manufacturing, corrosion , how many times is activated ( arced) and cable clamping differences .