New features can, and have been, added without giving up existing features.
I didn't say anything about "existing features", it's about what could be done with the memory used by that addition if the next great thing came along later that needed the space. They won't take away something, they just might find it very difficult to implement it.
We're not privy to how much free space remains with the current lineup of blocks, but however much that is, it's a finite amount and can't be added too, unlike a general computer, so we need to remember that requests for new features result in consumption of remaining memory. Like
someone once said, "There's no such thing as a free lunch."
Moving on…
I saw you worked on creating such a thing, and
said we're lacking key parts to make it happen, which is what I thought when I was trying to figure out such a thing.
If we could reuse parts of existing effects, I thought the Pitch Dual Detune would be useful, as would the Enhancer, so something that blended those two, with a touch of fast Autoswell, along with something that triggers changes in delay times or lines when a note is picked, or during the space between notes as
@Admin M@ said, and can alternate between up to three delay lines, and, added together, those might be sufficient to imitate the Mimiq. It seems like it'd be pretty CPU hungry if turned into its own effect, but it'd probably be more efficient than trying to wire together separate parts in the grid.
A friend of mine took the fast route and stuck a Mimiq into the loop of his AX8. I think it's an "interesting" effect but don't think I'd use it enough to want one or even have it in a preset, but other people's mileage will vary.
For people who haven't searched these are useful reading: