I scanned quite a few documents many years ago and it's been fun trying new tools every couple of years to see how good they are getting. I would say it's still not 100% there, but if you have them scanned you can basically just just keep trying and compare the results.
I think the only disappointment in recent years has been that storage has gotten more expensive instead of cheaper. I was waiting for SSDs to get cheap enough to justify moving all my documents to a fast flash array to process and search through them faster, but that doesn't seem like it will happen anytime soon.