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Yes. Either small known-party mints or conversely short time-duration mints.
I think these "ad-hoc" mint setups could be really good (ie. my 3-day festival idea I've posted about in other threads). So in this case the threat to frac-reserve would be limited by your time exposure to the mint itself. (add an auto expiry function added to Cashu protocol?....hmmmmm....)
If I remember correctly, in the early days this seemed to be the use case everyone envisioned. I guess it changed at some point?
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That is what I'm talking about. Use it and trow away. But this is just banking on steroids. Our own version of rug pulls.