The problem is: Once an ecosystem is stagnating or on the decline it's a huge risk to enter this space. It's not just your own market value you might be destroying, it's hard to find resources and to scale development.
Besides this, what I really want is strong competition between lib authors in order to keep the ecosystem evolving. Even current blockbusters like React face problems in this regard, like the react-router monopoly where maintainer Michael Jackson buys competitors from the market to keep his leadgen machine running. I know this is OT but a language without a huge OR trending ecosystem is worthless.