No, I haven't added Traveler or many other of the useful NRaas mods. I play on a very "essential only" basis, though I do admit that I find some mods by velocitygrass, twoftmama, nona, KissingToast, shimrod, and others essential if it means I can shift more items up and down on a wall or have CASt versions without set stencils and such. I do have a better computer now and I could rethink what I add to my mods.
The cache clearing and acquaintances dropping out might not be related. Maybe it's just what the game chooses to reload. My sims will give everyone they see a friendly introduction until they reach celebrity status (or know 24 people, if they are children) so that they can then make friends easily. Even when I am not playing large households, the sims just don't retain all the acquaintances over time. Not all of them have disappeared from the world, just disappeared from the list of acquaintances. (I associate it with refreshing or reloading my game and thus thought it could be tied to caches.)
