Theme 1 – Skepticism about the security rationale for closing the source
"If you believe they really did it for security, I have a very nice bridge to sell you for an extremely low price ..." – hungryhobbit
Theme 2 – Open‑source provides stronger security through community scrutiny
"Open source benefits from white‑hat scanning for vulnerabilities, while closed source does not..." – rectang
Theme 3 – Community reaction and emergence of alternatives > "I am now actively rooting for cal.com to go out of business now as a cautionary tale for any company thinking about taking open source projects proprietary." – lrvick