Why can't UTXOs scale at current stage? Is it linked to perceived high fees and dust UTXOs? What's the essence of the problem here? Imagining what could happen in 50-100 years time is not a constructive proactivensss. And why does James feel like LN is custodial? It easy quite easy to run a lightning node and it is not as gloomy as pushed by the author.  

 There's an upper bound limit on the amount of UTXOs that can be created. Can't recall how many it is tho.