NanoPi M1 Plus is a good choice for OpenWRT?

Hi
After some research I found this:
https://openwrt.org/toh/hwdata/friendlyarm/friendlyarm_nanopi_m1_plus
I think can be a good compromise for me (price, specs, etc)

Is also a good hardware for installing OpenWRT?
In the Installation method(s) of the wiki I cant find other information, can I use the integrated 8GB eMMC for installing OpenWRT?

Thank you!

What exactly are those?

Looking at the images provided for this device, SD card is the way to install.

https://openwrt.org/docs/guide-user/installation/installation_methods/sd_card

As frollic mentioned, it highly depends on the use case.
For IoT maybe.
But then you would be better off with some generic Linux distro like Debian/Armbian etc.

With only one LAN port and Wireless 802.11 b/g/n it hardly can be a good router IMO.