Such a myth about muscle loss. You only lose muscle when your fat stores get really low. most people think they lost muscle when in reality they just lost fat around their "muscles" that seemed so big at once.
Big ACH has no worries about losing muscle for a long while.
The famous Minnesota starvation study, where this whole starvation mode/muscle loss comes from is often misinterpreted, or deliberately manipulated to spout off bullshit.
These guys were put on 1500cals.
Their metabolism significantly slowed down, upwards of 50% drop, and muscle wasting began
when the subjects reached 4%BF, lol.
No competitor is going down that low, and if they do, they hold it for maximum a week, and then they're back to off-season eating habits.
That's the problem with modern day capitalist/consumer culture. Everyone is either getting used by money hungry dipshits, or they're highly reserved and critical and get lost in the sea of information available.
You have to put in time deciphering data if you're going to go that route.