If you're talking about internet lore, you get the advice you pay for.....
I've got a couple hundred thousand rounds loaded on my LnL, and it's still going strong. The biggest complaint with any progressive press is the priming, and it doesn't matter the brand. I've had two of the Dillon 550B's, and sold them both, simply because they didn't fulfill my needs. I kept the LnL, but I don't prime on any progressive press. When I load any of the 32 calibers I now load, it's with sized, prepped and primed brass, even on the progressives. Life's just much easier that way.
Hope this helps.
Fred