I've got a 2015 Macbook Pro that I'm planning on doing a clean install of Big Sur on. All of my data (iMessages, documents, photos) have been backed up to iCloud. I only have a few apps that weren't downloaded from the App Store - stuff like Chrome and Firefox. That being said, is a backup worth it when all of my data has been backed up to iCloud and I only have a couple external apps? I know making a backup is the preferred method, but when I have such limited data in the first place - is this necessary? Biggest things to me are iMessages and photos - but as I stated, these are backed up in iCloud.