Can A Network of Multisite networks include subdomain networks AND subdirectory networks

Hello,

https://premium.wpmudev.org/blog/network-of-multisite-networks/

We have a WP 4.75 subdomain multisite network with 60 sites active.
It has multi-domains and domain mapping active on the network
All sites are HTTPS

I have activated multi-network on it the subdomain network and all seems well.

From reading the article above and inspecting the multi-network create network form, it appears one can create a subdirectory network simply by entering the directory name in the path field.

It "seems" that NOT entering a path in the create network form results in a new subdomain multisite network while entering a path in the create network form results in a new subdirectory multisite network install.

OR must all new multisite networks created be the same as the base multisite network?
I.E. must all new networks be subdomain if the base network is subdomain?
OR must all new networks be subdirectory if the base network is subdirectoy?

Or can both types of multiste installs coexist on a multi-network setup?

This is my point of confusion.

I plan to test this on a staging environment, but hoped someone could clairfy before I proceed.

Thanks for any assistance.