Hi guys. I have important info, i guess it will be useful for retro-community.
NukeYKT (https://github.com/nukeykt) has made ultra low level (transistor-level) emulators based on real chips die-shots, including:

https://github.com/nukeykt/YM3812-LLE (OPL2)
https://github.com/nukeykt/YMF262-LLE (OPL3)
https://github.com/nukeykt/YMF276-LLE (low-power version of the YM3438)
https://github.com/nukeykt/YM2608-LLE (YM2608B/YM2610/YM2612) [Work-in-Progress]

Note: LLE FM-cores uses a lot of CPU time. May not be suitable for realtime playback!

Old and famous nuked OPL3 and OPN2 emulators are still active:
https://github.com/nukeykt/Nuked-OPL3
https://github.com/nukeykt/Nuked-OPN2
https://github.com/nukeykt/Nuked-OPN2-FPGA

Testing are welcome...