As a complete newb to the espresso machine world, the feature set I want to see is “Sleep”. It is not quite off but not fully heated either.
Take the Evo, it has a 15 minute heat up time. The limiting factor is the group head. Where is most of the heat lost on the machine? I don’t know, but based on heater wattage, I assume it’s the boilers. So preheating the group head, while keeping the boilers off, would allow a heat up time to be considerably reduced while not wasting as much electricity as if it was fully on.
Add in schedules and automatic sleep functions, and it would be really convenient feature.