That chime. the update adds back the chime to startup.
I did the install security updates this morning and I was walking out the room when chime hit, I spun around and said some horrible things about Apple for the next 10 minutes… until the update finished and I saw I was still on Catalina…
Lol, this was actually a good reminder for me since I’m still on Mojave. I checked and have a couple of security updates that I can install. Thanks for the reminder!