Yet of course, they rarely highlight the fact they had very different teachings in the past and kept changing them.
LOL, that's the thing.
They keep harping on and on about their "rich spiritual heritage" and old books, old phonograph records, old radio broadcasts, etc.
But if anyone of today's JWs would spend a non-superficial amount of time actually reading or listening to what was taught 100 years ago, or 75 years ago, or even 50 years ago, they'd immediately think it was some sort of "apostate conspiracy to make us look bad" or some such.
Their "museums" and "libraries" are stuffed with books that you are just supposed to admire the covers of, not actually read.