Too much curiosity made me install tonnes of packages, now how to get rid of it?

Couple of months back I installed Openwrt and I was way too overwhelmed with the options it provided.

Lurked on this forum and installed many packages and I don't even know what does that package do and I dont even use them.

Now do I delete all those packages without hampering my settings? I had a hard time setting up PPPoE so don't want to do that again. Unfortunately I don't have backup file.

I read this guide but I didn't find that option

Perform backup, then reset, then restore.
https://openwrt.org/docs/guide-user/troubleshooting/backup_restore

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Any idea what all will be backed up and what won't be?

In short...

Settings.

Packages.

See the "Customize and verify" section of the guide for details.

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Ok got it. But can you please point out which files do I need to backup?

I clicked on "Open list..." options and saw many files. All I want is PPPoE and wifi setting to be intact

/etc/config/network
/etc/config/wireless
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Perfect. Do you think it is important to backup anyother file to avoid any trouble?

Better safe than sorry.

Which files should I backup?

Backup the full /etc/config directory to be sure

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The default settings should be fine.

From the link posted above:

Click Open list… button to view the list files for backup.

or

sysupgrade -l

Do a system backup from luci, not separate files.

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