My "Fair bit of compression" was massively simplified: there isn't one true canonical "compression", but dozen different places and ways where and how to compress.

BugJail does compression around storage layer, but nothing before the network hop from capturing agent to processing server.

And fully agreed of course; when BugJail graduates to CI/QA/SIT/UAT/PreProd use, it will need compression before the network hop. But that is some time away. Currently the agent and server run in same box, and compression between them has negative net effect (compression uses more CPU than what shifting around less data saves).