I disagree with your assessment. To an average user, whatever winds up saved in their browser cache is there mostly unintentionally. Yes, it’s saving info from sites they choose to visit, but after that initial choice, the user is out of the loop. The browser saves what it needs to without user notification or input. I might even wager that most users are unaware of their browser cache, or don’t know what’s in it or how to access it. Therefore, I believe your metaphor perhaps confers too active a decision-making process on something that most people are completely unconscious of.
To be clear, the strawman average user I’m using here is me. I know I have a browser cache, I know vaguely what is stored in it and why, and I know how to clear it if I’m having certain issues. That’s about it. I sure as heck don’t treat it as an archive.
Further context, assuming the ruleset governing the OG Baldurs Gate games was true to the tabletop (I know they sort of kludged AD&D and aspects of 3e together). As the above said, a dual classed human “retires” their original class, and then begins to advance in their new class, essentially starting over from level 1, with only the hit dice and HP of their original class rolled over (you cannot access any of the class abilities you learned while advancing your original class). However, once your new class level is superior to your original class level, you can now access both skill sets.
It’s a very strange system, and I am curious what the fluff reasons surrounding it are, if anyone has any insight into that edition.