There are two different performance issues here. One is the stuff that Graphene is talking about, which affects all server sizes, and we are trying to fund work

There are two different performance issues here. One is the stuff that Graphene is talking about, which affects all server sizes, and we are trying to fund work on to fix in FOSS Synapse - see https://news.ycombinator.com/item?id=42752847 https://news.ycombinator.com/item?id=42752847. Entirely separately: there are bottlenecks you hit if you try to run a 100K+ user server. Synapse Pro fixes those bottlenecks, and the idea is the $ derived from that can then fund the broader FOSS improvements, which otherwise are starved of funding.