I don’t face the “Too Many Newsletters” problem that Om refers to.
Email newsletters were intended to address the problems of “RSS feeds” by consolidating all the information in your inbox. They aimed to streamline reading and information consumption.
I control what I subscribe to. I am not a completionist, so I often mark all as read. I unsubscribe aggressively. Plus, like Om, I keep Newsletters far away from emails and use Feedbin.
This has helped me keep the newsletter issues in check and not become a burden.