For some reason, the neighborhood I live in is susceptible to power flickers, and I get about one a month on average. The power completely cuts out for about a second or two, which is enough to shut off devices with soft power switches--and they don't come back on. Those with hard power switches, will power back up. This rapid transition in power doesn't seem to affect more robust things, like my fridge, water heater, washing machine, fans, lights, etc, but I am concerned with delicate electronics with hard switches, such as the Yggy.
I know I'm probably being OCD, but it was only a few years ago I thought $200 for headphones and $50 for an amp was high dollars. I have since become desensitized to an extent and now have more expensive gear, but moving past the $1000 barrier is huge for me, let alone the $2000 barrier of the Yggy.
If there's no risk of damage to the Yggy from power flickers, no worries. Life is great. If there is risk, then a UPS could be the solution. However, adding another $100-300 or more for a quality UPS/power conditioner adds to the entire price of the Yggy adoption, when every penny already counts as it is.
That's where I'm coming from.