@neil I think Matrix will be fine, because big organisations are already building on it and they will not let it die.

For example the Swedish Social Insurance Agency builds their new things on matrix (see https://cfp.matrix.org/matrixconf2024/talk/NFCLDB/), that agency could alone easily cough up that kind of money, it would be cheap for them. And that's just one agency, in Sweden, add to that all others using matrix around the world. The value matrix provides is huge, costs like $610K are tiny compared to that.