Currently, the quite popular [[ https://www.mediawiki.org/wiki/Extension:Arrays | Arrays extension ]] isn't actively maintained and poses some weird behavior, as well as questionable implementation in some cases. Considering this, we should collect all issues in one place and decide what should be done about that afterwards, maybe leading to an Arrays 3.0 release.
While the parser behavior should't radically change, I think virtually everything should be up to discussion here, especially removing obsolete features and doing backwards incompatible changes if necessary.
List of suggestions:
* Meta
** This extension should have one or two active maintainers.
** Adding a maintenance script to do most incompatoble changes
* Behavior changes
** …
* Feature requests
** …
* Removing old behavior
** Deprecating and removing Compatibility mode, as it makes code messy and development harder