I should start sourcing packwiz mods from modrinth to boost their downloads and improve reliability (because CF goes down often).
While packwiz plans to add a command for that, mmc-export could also be used for that, as evident by my test.

The task itself is changing CurseForge to Packwiz-Modrinth.py code to use mmc-export instead of packwiz itself:

1. Import MultiMC zip to mmc-export
2. Export it as packwiz zip
3. Extract the packwiz zip to the correct location
4. Delete the packwiz zip

In code it could be done similarly to mmc_export_modrinth_export: run only when the variable is set, execute a similar command in the system, then do copy/move/delete actions as needed. Tests are in releases, marked as x.x.x-pw.x

--scheme can be used to get a consistent filename for easy unzipping.

Well, I finally implemented priority for providers, so you can source most of the mods from Modrinth, and thoose which wasn't found, from GitHub or CurseForge.