Pretty sure that only accounts for easy-to-measure headline specifications - for example, it takes into account that people are buying 55" TVs when a few years

Pretty sure that only accounts for easy-to-measure headline specifications - for example, it takes into account that people are buying 55" TVs when a few years ago they might've bought 32" TVs, but ignores the fact that you need to buy a 55" TV to get similar sound and picture quality to a 32" TV from a few years ago due to quality reductions in smaller sets. Also, I strongly suspect any methodology using measurements of how much extra people were willing to pay when both were available overestimates the value of the improvements to all the other people who switched to the "better" product when the cheaper one was discontinued, since most of them didn't consider paying the extra to be worth it. For example, if someone needs a flash drive to transfer small documents around buys a 32GB one when they would've bought a 8GB one a few years ago because that's now the option that's cheap to manufacture and readily available, they don't get the same benefit that someone who paid extra for the 32GB model over the 8GB a few years ago did.