I run it on 2xRTX3090. I bought them used (probably ex-miners). > I always decide against it on the premise that the tech is so new I figure in the next 3-4 ye

I run it on 2xRTX3090. I bought them used (probably ex-miners). > I always decide against it on the premise that the tech is so new I figure in the next 3-4 years we'll see specialized hardware combined with efficiency improvements that would make my node obsolete. You're probably right, this happened back in the day with bitcoin mining.