> If the OP wants a compiler and toolchain that only changes every six months, that's already available. He can stick with the same compiler for six months or even longer with 0 downsides.

Sure, but there's also things like how long will the current version be supported if there are security issues, or similar. People also want a version that will be supported with bug/security fixes for 6 or 12 months vs "Oh it's broken? Upgrade to head."