Thanks @prateeksriv for the feedback.
We have an existing feature request that would allow you to "archive" channels, in addition to having an option to delete channels. https://mattermost.uservoice.com/forums/306457-general/suggestions/10960347-channel-archiving
Would you like to upvote the feature and perhaps participate in the discussion with other community members?
You get 10 votes in the feature idea forum, and each one influences the future of the project.