<p dir="ltr">I can't speak for others but as a regular but enthusiastic Haskell user the platform always (not just since sandboxes) felt outdated and limited to the included packages since the rest of the Haskell ecosystem rapidly moved on after a platform release (or even during its stabilization freeze phase before a release).</p>
<p dir="ltr">The platform is quite similar to Linux distributions like Debian stable or RedHat Enterprise Linux in that sense. Running software not in their repositories on one of those is a bit of a pain and not for the beginner too, just as running packages outside the HP can be when you start out with it.</p>
<p dir="ltr">The majority of the Haskell power users (library authors, people interested in the language development itself,...) on the other hand run Haskell more like a rolling release Linux distribution, dealing with problems due to cutting edge versions as they arise which means cutting Hackage versions do not build on the HP. On the other hand new versions that do compile very rarely seem to cause major issues, offering little incentive to use older versions for power users outside enterprise support environments. </p>
<p dir="ltr">Perhaps Haskell does need some kind of multi-tier system as those Linux distributions use? LTS and Stackage seem to be attempts to do just that. </p>
<p dir="ltr">In any case, I do not think the HP is the best environment for the new Haskell user. </p>
<p dir="ltr">Perhaps listing the possible types of users and their requirements and limitations would be helpful to decide what, if anything, should replace the HP. </p>