Short sessions are there because, for all practical purposes, SLO doesn't work and we are using short sessions to simulate high-latency SLO. In a previous life

Short sessions are there because, for all practical purposes, SLO doesn't work and we are using short sessions to simulate high-latency SLO. In a previous life we supported SLO properly, and it had no value at all. It's one of the many sad realities of the modern world that basic functions don't work and no one will fix them.