Have advertisments that you want to see auto delete after a set amount of time
I like getting offers from Proton and some online suppliers advertisements but we should be able to flag certain things to go into the trash (not the archive) after a set amount of time. If its been sitting in my inbox for a long period of time (opened, or unopened) like a sale for August but its December then it's probably ok to move to trash and then burn bin it without labelling the company as SPAM. You can even say don't delete anything that comes from MEGABANK CORP, or Purchase receipts/key activation codes. I look at my current mail account and every so often I have to go thru and delete ads that I like from the archive that spans maybe 2 years. If used properly and people know how this feature works, you could save a ton of storage space.