TLS is still legal. So is routing all your traffic through Tor if you think the metadata is relevant.
I can't imagine much useful material comes from wiretapping these days. Maybe once in a while, but the real value largely exists in the application layer, which is obtained in a different way.
Bottom-up. The FBI sees that you're having a TLS conversation at X time with a server in Facebook's IP range, so they just go ask Facebook for what you were doing at that time.
Foreign-hosted services seem like they'd be hard to crack, but it's extremely likely their data flows though Cloudflare, Amazon, GCE, or a similar US-based company.
I can't imagine much useful material comes from wiretapping these days. Maybe once in a while, but the real value largely exists in the application layer, which is obtained in a different way.