implement better protection from effect of failure to meet baselevel-x86_64-v2 is the title of a Bugzilla report I filed on 24 Jan. that has been locked inaccessible to openSUSE users. What I write here belongs in the news and announcements forum, but I am not allowed to create posts there. It was announced there Sept. 2022 as applicable to ALP, but I found out the hard way with a 4-core 4-thread AMD Phenom II X4 965 it applies to Leap 16.0, and duly reported so on the Factory mailing list, whereupon LuboĹĄ Kocman asked that I file a Bugzilla report.
What this means is that current Leap users should not bother to try an online upgrade from 15.6 to 16.0, or installing 16.0 pre-alpha or later afresh, on an unsupported (too old) CPU. These CPUs and the PCs and laptops containing them have been, unlike Tumbleweed, which uses hwcaps to keep older CPUs viable, ecologically un-greenly determined to be more landfill fodder for those wishing to continue using the stable version of openSUSE to which they have been accustomed.
The upgrade and installation processes are supposed to inhibit or outright prevent installation or upgrade on unqualified hardware, but this is apparently broken at least for now. Any simple go/nogo method for Leap users to determine in advance whether their CPU meets baselevel-x86_64-v2 qualification I have not yet located, but the tail of the following command will list subdirectories of glibc-hwcaps as a fair indicator:
/lib64/ld-linux-x86-64.so.2 --help