Is 16GB Normal for Windows 11 ARM on Parallels? Mac VM Disk Optimization Guide

Is it normal for a fresh Windows 11 ARM installation on Parallels Desktop (Mac M-Chip) to take 16GB? This guide by DP@lib00 explains the underlying disk usage and provides practical tips to optimize VM size, including CompactOS, disabling hibernation, and Parallels disk reclaim, while explaining why downgrading to Windows 10 is not recommended.