We need to summarize all of the gaps between Flow and DT in order to consider Flow's removal. To remove Flow, we need to find what makes Flow preferable to other options for their users.
The goal is to list the gaps, understand the load of efforts from an engineering, design, and community engagement perspective, and then prioritize them.
Done at https://www.mediawiki.org/wiki/Extension:DiscussionTools/Comparison
LiquidThreads (LQT) was added as well.