Out of interest I did a little test this afternoon. Got a 128GB SanDisk USB flash drive. Used diskpart to clean the disk then created a single NTFS GPT partiti

Out of interest I did a little test this afternoon. Got a 128GB SanDisk USB flash drive. Used diskpart to clean the disk then created a single NTFS GPT partition. Extracted the current Windows 11 ISO they offer for download onto the drive using 7-Zip. Tried to boot on a Surface Studio Laptop, a Lenovo ThinkPad X1 Carbon from 2019 and an Alienware M15 from this year. Failed on all three. Just to be on safe side I used bootsect to ensure the USB is bootable but again failed to boot on all three. I then used the MS Media Creation Tool which happily creates a FAT32 formatted USB drive. This naturally boots fine on all systems. So while technically me saying FAT32 is needed for EFI is not correct the reality is FAT32 is what you can be [almost?] certain is supported on any system using EFI. Not even on Microsoft's brand new flagship laptop or a brand new, high end gaming laptop from Dell appear to have NTFS support in their EFI. I wish it were as simple as just extract the iso to an NTFS USB drive and boot.