check this articles. some core developer may not contribute frequently. such as CJentzsch, tgerring, gavofyork. I hope ethereum could attract more talent and continuous grow, especially speed up pow -> pos transition. How the miner will react to future event, move away quitely to other mining project?
I think Eth is a clogging and vaporware scam everyone start to abandoning it, including the massive miners because of Eth moving to POS. People like gavofyork is moving on to start his own scam.