A tough road ahead, I agree. Currently there is other work going, by the Spritely Institute [0] non-profit. They are working on standard specifications fo the Object Capability Network (OCapN) [1] and Cap'n Proto may align with that. Spritely's object capabilities vision [2] looks very promising. Their open standards approach is very early stages still [3].

[0] https://spritely.institute

[1] https://github.com/ocapn/ocapn

[2] https://spritely.institute/static/papers/spritely-core.html

[3] https://ocapn.org