..it should be mandatory that the review includes a direct comparison with the immediate predecessor. IMHO, it’s not enough to know ion the product is good; it’s also important to know if there is a meaningful difference with the immediate predecessor.
If it was, and they did there’d be no point in doing reviews.
You only have to compare a 1980 NAD 3020 with a 2022 NAD 316BEE (whatever) to see just how much of what the reviews continue to imply, ie a solid 40 years of continuous onwards and upwards improvements, have actually achieved.
Nothing.