Ya it’s pretty handy having locking storage in the bed. For me it was suitcases and such for family trips. The hard folding cover I had worked really well and would fold up out of the way giving access to nearly the entire bed (but block the rear window).
My current truck is a 2014 Tundra. When I first bought it I immediately did a LineX liner, and drove it just like that for a while. Then I figured it would be nice to protect cargo from weather and humans, so I bought a folding tonneau cover (Bakflip). I drove it like that for a few years. Then...