Remarkable:
The PET-ability disappeared completely. Like the video clip: "Charging twice a week."
So there I see two options:
1.: (not likely): CMOS on GaAs just did not work out. The RO failed.
2.: "Please stop talking or even thinking about it - for now!!!" (TB, from behind the curtain).
Question: Is PET a part in our VCSEL transceiver? Ah!!!