Here is a recent Reddit thread on the topic[0] but the discussion has been going on for a while - at least a couple of months before the wormhole town hall thread that the top comment links to. There are a couple of other good threads that I can't find immediately - one in particular by an Hard Knocks member trying to clear up some public perceptions of how HK plays into the current jspace situation (apply salt, as with any public statement made by an Eve player who declares his affiliation). In any case, HK flairs are everywhere when this is brought up.
[0]: https://www.reddit.com/r/Eve/comments/52ri3v/lets_fix_high_c...
The stuff about Rattles being impossible to catch and not worth it if you do is spot on. Those things are so cheap. Not as cheap as when Goons were in Dek poopsocking Guristas DED sites, but still cheap. I help run a new player friendly low class group and we've pretty much skipped recommending remote-rep domis (which are even cheaper) and now just recommend Rattles.
The people who were running high class who decided to leave are pretty much (as far as I can tell) just running incursions. The description in the thread of how much work it is to set up a secure wormhole to PVE in is pretty good too. Incursions aren't as much money but they're so much easier.
>price inflation
Nah, I don't think it was enough to make tooooo much of a dent in prices. Even before the current exodus, jspace players are like 2% of the population. The null ratting faucet dominates the blue loot faucet hard. The highsec incursion faucet is bigger too, but not by nearly as much. Similar case with running lowsec Level 5's in an insured carrier - 1b/hr, but so few people do it that it's not a big deal.
Btw I was being a little facetious about the insurance (in jspace). Caps are probably not buying insurance much honestly. You can only insure in a station, not a POS or citadel, so it's a pain in the ass to get your cap out of the chain, insured, and back into the chain every 3 months. Caps mass holes pretty fast. The lowsec missioning caps, on the other hand, are certainly insured. I think you lose 150-200m tops from a t2 fit, platinum insured carrier or dread loss. (A plat-insured Dominix is a 50m loss, and 6+ of them remote-repping each other is about as cancerous as the old slowcat fleets, but in a subcap form - thank god you can't move them far or fast because of lowclass mass limits.)