@Gargron My personal experience is that the "cheap" consumer film stocks (Colorplus, Gold, Max, X-TRA, Superia, etc.) look really lovely exposed a stop over, and a lot less so a stop under.

And given how many of these films were loaded into cheap/disposable lenses with slow lenses, it's little wonder that they've developed a reputation for being muddy and low-quality.

They just need a chance and a bit more light to shine!