Hi ushilives, you can install on NAND in many ways:
- use rkdevelop tool (hard)
- dd from a working libreelec (medium)
- use the great multitool from armbian port (easy)
Installing on NAND should make the boot a bit faster, but the major issue is that in order to update the image you need to upload it manually via ssh (or burn again).
This is because I didn't setup yet an update site for my builds.
p.s.obviusly, if you install libreelec on NAND, you will lost the stock firmware of your box.