I hope this is poorly phrased or I am misunderstanding it, because it feels like it's implying that Matrix's terrible scaling issues will have their fixes paywalled. Even non-federated homeservers chew up RAM and CPU like candy when you get too many users.
It's heavier than any other protocol or chat program I know.
Most of that performance is nothing to do with whether workers are written in python or rust - see https://news.ycombinator.com/item?id=42752911. The hope is to fund maintenance for FOSS synapse, including core perf work, via Syn Pro stuff which makes the biggest impact for gigantic servers.
It's heavier than any other protocol or chat program I know.