I've got ammo I reloaded years ago in which I left the lube on ... and it looks rough these days.
I do not leave lube on anylonger.
After I have prepped all of my brass, gotten past decrimping and resizing and belling case mouths, etc ... I wet tumble. From that point forward my fingers never touch the brass or bullets again without gloves on.
I've been doing that for about seven years now and my reloads are still looking great. I reload bulk 5.56, 7.62 and 9mm at a time ... I fill milspec ammo boxes per run, and my finished product stays purdy ... and I like purdy products that I make myself, especially firearms related stuff. It's a pride issue. I want maximum performance custom tailored to fit my needs and I want it to stay purdy when I am done with a run.
So no, I no longer leave case lube on my cases but neither was I happy with dry media tumbling after case prepping.
Wet tumbling before priming and then using gloves through the remainder of the process has been my solution for quite a few years now.
There is one other HUGE benefit to doing it this way as well ... perhaps someone already knows what that is or is willing to take a guess. But it is a HUGE benefit to take into account, especially these days. HUGE