Absolutely! If the user wanted the Creation Time column displayed all the time, they would've already added it to the applicable Folder/Content Type/Default Format. If the user wanted the Creation Time column displayed only during the current Opus session (i.e. the life of the current Folder Tab), they can enable Format Lock, conveniently located in the Status Bar (and in my case also by hotkey sequence).
Consider this modified example:
The user lists C:, governed by the Local Drive Default Format, and subsequently adds the Creation Time column and does not enable Format Lock. In the same file display, the user proceeds to C:\Music, governed by the Music Content Type Format (which does not include Creation Time). Today, Opus discards the Creation Time column.
So why should this behavior be any different if the next folder listed is governed by the Local Drive Default Format? The user already made their choice, when they enabled and configured Local Drive Default Format, that means they wanted to use that format. It simply is not intuitive to give the user discretion to enable and defined a Default Format, then turn around and ignore that preference in everyday use. If you are going to automate a behavior, it should be for the 80% majority, not the 20% minority.
The more familiar a user gets with Opus Folder Formats, the less intuitive this temporary Default Format monkey business becomes. It is really not intuitive to treat folders governed by Folder and Content Type Formats one way, but those governed by Default Formats a different way. Folder Format-savvy users will implicitly expect the format to change upon listing a new folder, unless Format Lock is enabled.
The novice Opus users stand even less of chance of figuring this out intuitively. Users migrating from Windows Explorer will have one of two expectations:[ol][li] The format changes for each new folder listed, unless:[/li]
[li] The user has saved a format for all folders.[/li][/ol]
The thing that usually trips up new Opus users (regarding folder Options/Formats/View Mode) is that, in Opus, they must explicitly save the format for the current folder from the Folder Options dialog. This is in contrast to Windows Explorer, which saves so many hundred (400?) folder formats automatically, the least used folders automatically bubble off the format list, the most used remain on it. But the issues we have been discussing in this thread have no bearing on this migration issue one way or the other. So that is part of their growing pains when migrating to Opus.
I understand why the current behavior is there—it's well intended. If I remember correctly, this behavior made sense back in the Opus 6 which pre-dates Default Formats and Content Type Formats. All we had in Opus 6 were Folder Formats and a default set of Folder Options in Preferences. But with the advent of Default and Content Type Formats, I'd be happy to see the temporary format go the way of the dinosaur.
Another point of confusion related to this issue is the View Mode = Auto setting inside a Lister Style. I've looked long and hard in the documentation, but what this specific option actually does isn't really explained anywhere.
What it implies to me, is that the Lister Style should not apply any View Mode changes, but should instead let the Folder/Content Type/Default Format applicable to the listed folder dictate the View Mode. The only exception would be if the Lister Style's own Folder Format also saved a View Mode. (I'm not this is saying how it works or should work, I'm saying this is what would make sense to me, in the lack of any documentation on this setting.)