TPTB's premise is that IP addresses and other metadata are being spied on. You can't transact in basecoins, even just to move from one mixer to another, without encountering that exposure.
I don't agree with him that transacting in zerocash without worrying about your metadata exposure is of any real value, and neither does anyone else, but that's a different issue.
Also, TPTB operates under the premise that miners will be centralized and engage in 51% policy attacks. If they do that they can refuse to allow you to move your basecoins to the new mixer unless you identify yourself.
I agree with you that the possibility of moving to a reset coin has some potential value. It also has potential risks. The more times your have to perform the setup, the more opportunities there are for it to be compromised. Especially if it becomes routine and people get careless. Zcash has not said anything about planning to do these kinds of resets, as far as I've seen.
The above comments are in regard to a permisionless cryptocurrency ledgers, not permissioned blockchains.
Thanks... it is hard to know what TPTB has been talking about since he just says "read my thread". You summed it up nicely... I've been wondering what he has been talking about and too lazy/busy to read his long threads.

I am sure governments and/or government contractors and/or corporations are probably scraping metadata from Bitcoin (and possibly other cryptocurrencies.) I haven't done a ton of research on the subject like you guys, but I tend to agree with you that if you wanted to be as private/anonymous as possible, you would still need to try and obscure your metadata even while using Zcash. If the view key is ever compromised then so is your privacy, and it would also be necessary if they do a reset. I don't think this will be a huge issue for corporations though, because really we are talking about IP (or possibly computer hardware/software (or OS) versions) leaks... which they wouldn't really be too worried about I don't think. They are more worried about financial privacy than anonymity, so that their competition is kept in the dark.
If it is true that, with the Zcash view key, someone can see all transactions that ever occurred on that account, then I see this as a major blow to the functionality of Zcash. Perhaps there is still space for a technology like Monero with per-transaction view keys (and hopefully Monero will be combined with some type of CT implementation soon.) I can't imagine corporations wanting to open their books to anyone and everyone that they need to prove to that any certain transaction(s) occurred. I am still confused if the Zcash view key reveals all transactions for any certain account, or if can be done on a transaction-by-transaction basis.