Maybe among the general mac population they are a rounding error. But among the mac population who actually peeks behind the curtain and uses homebrew?
That’s not to say you’re crazy or anything. You do you. But do understand that you almost certainly constitute a nearly irrelevant minority of users of homebrew.
Intel homebrew is larger than Linuxbrew, yet I think it'd be shocking if they dropped support for Linuxbrew.
Old machines still work. They're still deeply useful. I'm still using daily an Intel Macbook with homebrew on it. When I no longer use it daily in some years more, it'll still make a perfect server.