1. The PP explicitly says that Wolfram can collect and retain data indefinitely. The FAQ promises a horizon of 1 hour. 1 != ∞. Which of these documents is to be believed? Which of them constitutes a legally binding document?
2. I don't want reassurance from some Joe Random Shmoe. Your users have a relationship with Wolfram LLC (or whatever the legal entity is). So any meaningful guarantee needs to come from that entity. But until now, Wolfram has only provided weasel wording and cagey language. I appreciate you sharing your name, but then again you have a product to peddle, and we both know that nothing you say here is legally binding for Wolfram, so you could say anything.
3 & 4. PP provides no meaningful long-term guarantee. Saying that this is standard for many in the industry is a cop out. If your company is really committed to these principles of privacy you espouse and claim here in this forum, it certainly has the legal staff to get it written into those two documents to which you linked.
Time to get your principles in your legal documents. It's duplicitous to claim the high road while peddling agreements that sign away so much PII to Wolfram.