I think it’s very healthy to have these kinds of conversations which reflect a range of views on where Tiddlywiki is at and where it should be.
I do feel however that decades of mega-corp values and insistence on growth in just about anything from economies to software have ignored the other viewpoint which is sometimes small is better and sometimes sustainable is better than growth.
I would be concerned if Tiddlywiki user absolute numbers are dwindling but perhaps less so if the percentage of the potential user base was diminishing if the reason was that the potential user base was growing.
A lot of time and effort went into Tiddlywiki and it has huge value to some people so there would be concerns if it was heading for the trashcan. Also concerns if usability is frustrating some users who would otherwise find value.
However I don’t go along with the continual growth mentality - some things are great at the size they are - small is beautiful is not something you hear so much these days.