If Apple hadn't released an upgrade, we wouldn't all have to go through the time of upgrading, fixing apps that are broken (or finding new versions, etc). There is a cost to all of Apple's users from OS upgrades, and we can be annoyed that we are spending that time / energy and getting nothing of value back.
I started the upgrade this morning, took a shower and when I came back it was done. Logged in and clicked a couple of buttons (activate Siri etc) and everything was just like I left it when I started the upgrade. I could jump right back in. Perfect.
