I still think that's entirely fair for a power user tool like homebrew. With the upgrade rates of macOS that probably means that's 98% of the users would be covered. Expecting an open source project to accept bug requests from a bigger variety of versions that then would need test devices on these versions to replicate issues sounds unrealistic. Bigger companies, or Apple itself I would hold to much higher standards when it comes to that.
I still think that's entirely fair for a power user tool like homebrew. With the upgrade rates of macOS that probably means that's 98% of the users would be covered. Expecting an open source project to accept bug requests from a bigger variety of versions that then would need test devices on these versions to replicate issues sounds unrealistic. Bigger companies, or Apple itself I would hold to much higher standards when it comes to that.