I wonder how many people did this. I did, and deleted my posts as well. But I was mostly a lurker there and so my edits and deletes didn't really mean anything.
I would typically abandon an account after one year and make a new one. I used my first one for about 6 years before I started that practice, which was spurred because I got doxxed by a malicious mod.
I did my own script for it. Most were deleted, a few recent ones were left edited.
It does suck for someone who wanted anything useful I posted, but ultimately I think Reddit having it to draw any traffic is more harmful. I want them to lose their stranglehold now that they're abusing it.