For almost a decade I have worked with IPsec and OpenVPN solutions for both client and site-to-site VPN tunnels. On enterprise hardware, community/proprietary software and at public cloud providers. I still work with these because today many vendors only support IPsec.
A few years ago I discovered WireGuard and I was really amazed how easy it was to setup a tunnel. Especially if you've dealt with IPsec before. It felt as easy as creating an SSH tunnel between two servers, with only 4 or 5 lines of code in a config on both sides.
Then last year I discovered Tailscale and I was blown away! How did this even work[1] without opening ports in the firewall? And how cool is it that I no longer have overlapping addresses[2] from other networks. Within 15 minutes I had my own mesh network between my Mac, iPhone, Raspberry Pi and other servers. Fantastic!
I'm on the Personal/Free plan but if this would no longer be free, I would be happy to pay for this service (shut up and take my money).
>> Looks like that Homebrew users (both macOS and Linux, both Intel and ARM) are unlikely affected?
> Correct. Though we do not appear to be affected, this revert was done out of an abundance of caution.
[1] https://github.com/Homebrew/homebrew-core/pull/167512