I want to be able to maintain updates of Sublime Text using a repository, not via unsigned downloads from the website. If the maintainer of the repository (e.g. packages.linuxmint.com) doesn't update, then I don't feel a strong need to review that decision. It'll update often enough, and presumably with a bit more testing before updates are pushed through.
If I did want to manage updates by downloading from the website, I'd still want to be able to have the notification dialog accept an option to not notify me again for the given version, or some such thing. Nagging every time the software is started is pretty annoying.
If SublimeText was open source, I'd patch this. Makes me wonder why I'm using a closed source product for something as important as my coding environment.
Where did the idea of setting "update_check" come from? Is that documented somewhere?