Recent tests have shown that prelinking works only when PIE is not
enabled [0], and as PIE is both a desirable security feature, and the only
configuration provided and tested by Yocto, there is simply no sense
in continuing to enable prelink.
There's also a concern that no one is maintaining the code, and there
are open bugs (including serious ones such as [1]). Given that prelink
does intricate address arithmetic and rewriting of binaries the best
option is to disable the feature.