Getting a reimplementation feature-complete and bug-compatible enough to actually reliably and accurately run old content is hard work that realistically will n

Getting a reimplementation feature-complete and bug-compatible enough to actually reliably and accurately run old content is hard work that realistically will never be complete. Most current reimplementation attempts cannot play any but the most simple flash games. Sticking the whole thing into a VM and just running the original code achieves both accuracy and safety, at the cost of resources. Given that Flash died long ago, i.e. hardware has advanced since then, resources are not a major issue, and are going to be even less of an issue going forward.