Comment by mappu
Trixie now has go1.24 - including the upstream default GOTOOLCHAIN value to automatically download new compiler versions straight from go.dev if the go.mod wants them.
I was a bit surprised this is not a Debian Policy violation (and any Debian patches for security support may no longer apply), but at least the user experience will "just work". Cross-reference https://bugs.debian.org/1040507 .
That is both neat and surprising.
That said while my specific example perhaps is obsolete, the general class of problem I described is not.