Design flaw, if you want to shoot Log.
But recall generally reserves for breaking a camera, like oils landing in the sensor, light leaks, as opposed to requiring hardware for more features.
It doesn't stop you not having the firmware to take the same photos, it only stop you to shoot Log. Is it cheeky? absolutely. Does it bother me, not one bit.
If I were to shoot log and need to and it is work, £100 a drop in the ocean, compared to say changing your system, buying a new body for just for this feature from another camera. I don't know why people complaining about it, those do complain seems to never shoot video, never mind Log.
Serious question, who shoots Log in here?