I would describe it as
A Wiki
A tool for a personal knowledge base.
These simply reflect my use and interest.
I am pleased that “extras” are plugins and not core features - that way the core product doesn’t try and be a “swiss army knife” and be all things to all people, that comes hopefully out of the plugins - those who want other features can add them but we are not all pulled along the same path.
I think the core product is just about right, no complaints only good things to say, that’s not say I don’t have a list of wishes but I try and focus on my research - tiddlywiki is only the tool (although its a brilliant one), often it’s just better to manually steer around an obstacle than to fret about getting every last bit of desired functionality. I spend hours each day most days working with Tiddlywiki.
I use it in non-server - single html file mode which is one of the major bonuses for me.