That's a great thread that you linked.
One thing worth noting is that though I've never kept a ratsnake, they are likely much more tolerant of enclosure conditions and parameters (light levels, temps and gradients, hiding opportunities, humidity) than a BP, and so if anything that thread is understating the challenges in getting things right.
Providing a naturalistic enclosure (all furnishings made from natural materials, preferably that take into account the needs of the snake species) provides virtually all the benefit of a "bioactive" enclosure (one that is naturalistic and also pretends to process some waste) with much less difficulty and chance of failure.
I keep many dart frogs in what some people consider "bioactive" enclosures (there are differences, to be sure, and imitating dart frog enclosures for other species is both common and a terrible idea) and absolutely wouldn't do that for any species that doesn't require it or at least show substantial and measurable benefit from it.
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