Comment # 2 on bug 1201784 from Steffen Winterfeldt

That option is actually for an s390x feature where the console exists only
after
loading some driver. The expectation was to switch to that console once it
becomes available.

I left this console switching limited to s390x in sle15-sp4 but made it arch
independent on tw. I have no problem to limit it to s390x also in tw. But I
wanted to see what happens and if there are cases where this switching
has bad side effects.

In general, the option only has an effect if no explicit console option is
used.
So basically x86 should not work differently than before. I was suspicious
about
aarch64 or generally for archs where the default is some serial line.