I use last or second to last version, usually because a little old versions are good enough for me and my students (I use TW for personal knowledge management and university/grassroots classes/workshops).
The important think for me are plugins and default theme, which usually are packaged in a particular wikis like Projectify and the excellent variants from @Mohammad, mainly Shiraz and Mehregan and Krystal Whitespace.
What I would like is to have a custom build version with the things I like the most of each wiki variant. We have created several mods, but still I would like to have a programmatic way of creating them, instead of taking the most visually compelling one (usually are based on horizontal scrolling like in Krystal variants) and start to customize it by dragging and dropping plugins. This programmatic extension and manipulation of TW is what we’re exploring with TiddlyWikiPharo and we have in our radar also Gatha Studio and Tinka.