Again, my knowledge is specific to roller chain:

To really measure component wear, you need to apply a static load of 1% of Ultimate, which is 18 lbs measuring load on a #40 or #41 chain (41 is the old ANSI designation for bike chain, but would have probably been an old 5 speed chain at this point). Under measuring load, the amount of wear seen grows dramatically, but again, this may be more pronounced on roller chain, with roller to bushing wear and bushing to pin wear.

Also, modern bike chain may not use a full hard link plate. Your information is very detailed, and a softer link would show more wear between plates.

Another interesting thing, most folks have no idea how much a chain will grow in length under load. We prestressed chain to 40% of ultimate at assembly, and you would have to allow 3/8" growth on 16" of chain (for 1/2" pitch chain, or essential 32 joints). Granted, that is a 700# load, and more than a bike sees in use, but anyone who thinks chain length is static under load is mistaken.