It's very presence in the list is already a drain on my attention that I didn't ask for and do not want. The fact that it requires any action on my part to remove it from the queue is an issue in and of itself.

Not really. I check a couple of times a day, look for stuff from people who are likely important, delete noisy stuff once a week, and the rest lingers.

The threaded nature of email both helps and hurts. If it’s from a chatty sender with a chatty reply all conversation, I can delete it all, except if my boss replies, I should probably look at that.

I should also say that I work at a large company where people are auto-included with varying levels of intention. If I never sent an email, I would still get hundreds per day. Coworkers do zero inbox, so it can be done. I just don’t try anymore. Slack is where the actually urgent stuff is anymore.