Fair enough (though executive summaries are by nature, lossy contextually). I don't disagree that InfoSec was a driving force behind the project, and may have

Fair enough (though executive summaries are by nature, lossy contextually). I don't disagree that InfoSec was a driving force behind the project, and may have given it an unhelpful level of urgency (i.e. pushing for the team to make early decisions/plans too quickly, which anyways resulted in this banned PHP thing lasting 4+ years, seems counterproductive). But even if InfoSec was not a factor, the team knew that staying on MediaWiki was not sustainable, and some kind of migration would've happened eventually. So I guess what I'm saying is, IMO the perceived pressure from the InfoSec mandate was poorly managed by this team, and ended up exacerbating the problem, but fundamentally the choice to migrate to a different wiki platforms was something the team wanted to do (just maybe on a different schedule or with different plans/priorities, in an alternate universe). Migrating off MediaWiki was not done against their will.