Went years without a tumbler.
I wish I had discovered the tumbler much sooner in my reloading career. Full-length sizing of .30-06s was always a pain until I actually found a tumbler discarded in garbage. Tumbled a batch of '06 brass, lubed them up and ran it into the die. So, so much easier to re-size. Now, all my brass gets, deprimed, washed and tumbled.
Int'l Assoc. of Law Enforcement Firearms Instructors