It has to go sooner or later, regardless of how little it costs etc, otherwise we would still have SCART connections on these consoles.
If it affects you now either keep your current PS4, use an ARC on your TV or get a HDMI splitter. In the long term just don't get any more equipment that relies on an optical connection. They won't be standard, even on headphones, for very long.
In an earlier post I mentioned that I am using Z5500 and that sound system is fantastic for gaming. Other than that I also have the PS bluetooth headset too.
The replacing my now unavailable logitech surround sound system with an equally capable HDMI system is an expensive proposition. That said, for folks who will be making their first purchase of quality surround sound systems, HDMI is the only way forward.