It was generally assumed that CryptonightR didn’t have ASICs or FPGAs mining it, but it turned out to be wrong. Facts:
– After Monero forked to RandomX, all coins on CryptonightR got a spike in hashrate and became unprofitable. Even Vega GPUs are far in the negative zone. This hashrate spike didn’t go away even now, after 1.5 months.
– Sumokoin nonce distribution chart (red line marks Monero RandomX fork):
– one picture speaks a thousand words. Immediately after Monero’s fork, Sumokoin’s pattern changed from normal GPU mining pattern to something entirely different.
Morale of the story? Old Cryptonight is no longer a viable algorithm, no matter how many tweaks are applied to it.
Edit: same chart with Sumokoin network hashrate on top of it: