Although I have to have a machine running macOS Tahoe to support our customers, I personally don't like the look of Liquid Glass, nor do I like some of the functional changes Apple has made in macOS Tahoe.

So I have macOS Tahoe on my laptop, but I'm keeping my desktop Mac on macOS Sequoia for now. Which means I have the joy of seeing things like this wonderful notification on a regular basis.

Or I did, until I found a way to block them, at least in 90 day chunks. Now when I open System Settings → General → Software Update, I see this:

The secret? Using device management profiles, which let you enforce policies on Macs in your organization, even if that "organization" is one Mac on your desk. One of the available policies is the ability to block activities related to major macOS updates for up to 90 days at a time (the max the policy allows), which seems like exactly what I needed.