What value is there to invest in PnP subsite creation when we now will have modern team sites?

Hi again,

Slightly different question/concern from my previous one but in the same realm.

I've been sharing the "killer features" of Save site as a provisioning template and the ability to create Pnp site directly through the "new site" link in site collections with my clients. They are excited however equally concerned because the future of team sites is going to be unified groups and the above features are not available in Modern teams sites.

Will they be?
A dilemna when we want to embark on a major team site provsioning initiative. Which way to go now??
Will we be able to:
- Activate Pnp features on unified groups so that subsite creation would be handled by PnP partner pack?
- Create Unified groups through the partner pack just like site collection provisioning?
- Save a Group site collection as a provisioning template?
- If we create hundreds of classic teamsites will there be a path/track to convert them to modern team sites?
Enlightenment is surely appreciated!
Thanks!