I mean that's exactly how Firefox operates. They divide the opposition to feature removals by continually allowing the most vocal critics a workaround, until finally when it's removed completely most people have already learned to live without them.
They moved the option to keep browsing history but not keep download history to a user-pref, and then later removed it.
They moved the option for tabs-on-bottom to a user-pref, and then later removed it.
They moved the disable-automatic-updates to a user-pref, and then later buried it in an external policy JSON, which I guess it's okay to see if that file exists at startup but not the user*.css files.
They moved the option to keep browsing history but not keep download history to a user-pref, and then later removed it.
They moved the option for tabs-on-bottom to a user-pref, and then later removed it.
They moved the disable-automatic-updates to a user-pref, and then later buried it in an external policy JSON, which I guess it's okay to see if that file exists at startup but not the user*.css files.
And on and on.