This is nice, but I'm confused about one thing: how can instance owners ensure illegal content such as CSAM doesn't get cached on their servers if defederation is not a thing?
Their help page technically says you can use the same phone number on up to 10 accounts, but that hasn't been the case in 4–5 years or more. It's more like 2–4 accounts per number allowed in my experience, and there is a few week cooldown on reusing a number even if you've already removed it from all accounts.
I don't think you can use the same email on multiple accounts at the same time, but using address extensions or creating new emails is easy.
I suppose it does raise the bar somewhat, but there are many websites that sell access to phone numbers that specifically work on major services like Google for as low as 10 cents per text.
also, the minimum is actually 4 digits. you can tap "passcode options" when setting/changing passcode. not sure how much better that would be though. i generally like face id but i do hope they add in-display touch id sometime.
It's common for them to not include more than original and/or English audio, but most competent groups will generally include all available subtitles at least.