Next version has a simplified layout to reduce the strain in the CPU. Let's see if that solves some of the problems. But yes, Amethyst doesn't work well in devices older than 2020 :( . There is just too much going on.  

 I remember an old podcast episode where the #primal dev said the client relied on some very aggresive caching and that the whole stack was #foss

The secret sauce? 

 yep, they centralize in a caching server primal offers as well.