Because it sucks so bad, it even fails to flash the TX1 as of march 2025. Also, it does not let you flash to the SD card, and there is a million other reasons not to use it
0. Files needed (sha512 sums)
017e6c0f5f903d0b3f50454b45d41a86b693a11c6cba37eec32e5e110e1f37ef4163b568a8d60ca51cba472c430567dd828bf03fee8a174442d1ac2239e25df9 Tegra_Linux_Sample-Root-Filesystem_R32.7.5_aarch64.tbz2
8c188dbc85eab38c589470e9e81c367e8a5b73e4f4f7450d825550fc7b750c2393bf7260f3c65b2e947ef74469b828831de168ec0bb9563b841c73048bce1dee Jetson-210_Linux_R32.7.5_aarch64.tbz2
You can get them from the NVIDIA SDK installer (select "download only"). Please note that it ONLY works in ubuntu 16.04 LTS, and if you are planning to run it in a VM, it only works with VMWare. VirtualBox USB passthrough is broken. Allocate at least 60GB for the virtual HDD.