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I can live with it being single boiler - it doesn't take long after the steam switch has been flipped for it to get up to steam temperature.
My morning routine is make two espresso shots, top up one with hot water then turn on steam to do the milk for my flat white.
After much reading up it seems steaming would be improved as the default steam temperature is high (150ish, IIRC) and most people dial it down to 130-135 when they have a PID.
Working out the optimum temperature for a good shot and getting that dialled in is a big attraction too.
The steam temp may be a bit better but after pulling a shot you still need to wait for the boiler to increase in temp for steaming.