- meant for private trackers. no DHT etc

- made for long-term seeding of tens of thousands of torrents

- avoid O(torrents) operations. e.g a client UI shouldn't require iterating over all torrents on each update to get its state or statistics

- made for remote UIs

- no support for ultra-low memory systems. we won't be wasteful with memory, but we'll use more memory if it significantly improves performance

- probably no support for racing. we'll not violate protocols to race, e.g. by ignoring the announce interval

- probably no support for ancient clients. we'll depend on protocol extensions when they're ubiquitous