Just how secure is Cloudflare? What data do they collect when using their services on a MacBook?
“How secure” is a vague question, as there are many aspects to their security.
Is there end-to-end encryption with Cloudflare ?
End-to-end for what? As a proxy server, Cloudflare internally decrypts your traffic as it optimizes content and checks for malicious behavior.
And there are plenty of articles detailing all their improvements and road maps. https://blog.cloudflare.com/tag/security/