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Hmmm, but in the wee hours is when I have my backups and automated maintenance scheduled.
I have timeshift running hourly regardless if using the system. Once the initial backup is complete, any actual performance drops are very negligible since it uses incremental backups, I don't even notice the program is running most the time. As for automated maintenance, I don't really have anything like that, I run an update manually every few days, but I could probably configure unattended-updates to do it for me, I just don't like the idea of automating that.
Snapshots, or actual backups? You're doing full system backups hourly?
My backups go pretty fast, but they still impact CPU, and interfere with both network, SSD, and USB bandwidth. I could do that hourly, but jesus that'd impact my B2 bill significantly. And I hate having things randomly slow down.
Snapshots are cheap and fast, but they aren't backups.
Timeshift uses incremental backups under the hood (using rsync) calling them snapshots. As long as you are using the rsync one and not the BTRF style one, it works the same. I can load my current setup from a live disk and restore just the same.
Basically the first backup ever done is a "full backup" then every backup past that is an incremental one.
Being said, my off site backup isn't using a cloud provider, my risk case doesn't need that, I store backups locally and then clone to an offsite every once and awhile