I continue to feel that the best solution to the preview problem is to curate a collection of packages, one for each proposal. The single-minded pursuit of discoverability in this proposal creates a number of completely unnecessary problems around stability and deployment. Put together, these problems ironically undermine the discoverability goals by discouraging use of the preview package altogether. Using functionality from the unified preview package creates a ticking time bomb where the programmer is likely to be forced to make source changes across their codebase whenever the package version needs to be rolled forward for any unrelated reason, and it cannot be used in good conscience in any sort of open-source library. In contrast, with a collection of independent packages, programmers can independently manage the versioning of different preview libraries, and programmers can easily solve deployment issues by including the package as long as it is still necessary.