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How will you make sure to keep this upto date?

Well this code is literally a copy of JetPack module. I will keep a close eye on every JetPack update. If they update this module, then I will be sure to update this plugin as well.

How can I get rid of the Comments?

I thought long and hard about whether to add this feature in the gallery carousel or not. Because the goal is to transform your standard galleries into an immersive full-screen experience, I think that comments are necessary. This is why I will NOT be adding an option to turn the comments off.

However, if you want to turn off comments on Media attachments, you can follow this tutorial:

How to Disable Comments on WordPress Media Attachments