"It's presumptuous to take a product that was entirely and successfully developed for years under the BSD license and then claim it as a GPL success story because the new maintainers had a moral imperative to relicense."
Something to remember is that the key pain point at this stage of Netatalk's development was that its CNID scheme -- the method by which the server gives a unique identifier to each file/directory and refers to it when communicating with the client -- was broken and frequently led to silent data loss when the server would mistakenly reuse IDs.
This problem was well-known and well-understood. And nobody -- certainly not the big companies who'd fixed the problem in their private forks -- would step up to fix it.
In this context, it's very hard to truthfully characterize Netatalk as "successfully developed for years under the BSD license."
A file server in widespread production use with a well-known data integrity problem? That no one will fix? Call it what you like, but that ain't a healthy project.