The trouble with Aniplex is that they're super savvy - the reason people are willing to pay so much is that 80-90% of their shows end up being massive hits, so there's always demand, no matter the price.
Like it or not, it's certainly been sustainable for them so far. Although, I do wonder how long it will continue to be so. (And I don't even mean I don't think it will, I genuinely wonder if it will and think it could easily go either way)
Aniplex shows tend to be huge hits, in part, due to popularity gained during their initial broadcast. In the Western markets, this tends to mostly equate to simulcasts and post-broadcast legal streams.
Legal sites, whether Crunchyroll-style anime focuses ones or Netflix-style general sites, make it a lot easier to recommend shows to other people. No trying to get them to play "Hunt the Fansubbers Who Didnt Give Up Halfway" or to struggle with sites potentially infested with crapware.
And much less having a show becoming harder to find the moment it gets licensed. So you can continue the momentum of people discovering the shows.
Get enough people interested in the show in the first place and even if a only small percentage of them like the pricey bells-and-whistles releases, a small percentage of a large enough audience will still allow a fancy edition to sell well.
Where this might start to falter going forward is that it is dependant on people watching in the first place. Remember, people can favour standard/cheap releases and still aid popularity via word-of-mouth. They're an "infection vector", if you will.
So what happens if people who favour cheaper releases start to take my viewpoint of just passing over the majority of titles from Aniplex during the initial airing?
I don't do it to "Prove a point", more like I don't want to get invested in a show to the point of
really want to own it physically (but without paying extra for bells and whistles I actively dislike) and then seeing Aniplex pull this kind of thing. I know they're going to, so why bother when there are already more titles out there for me to watch or buy than I have time for? So I don't watch shows like Erased in the first place, as soon as I know they're by Aniplex.
Now I'm just one person, and I don't really have a huge sphere of influence. But what if more and more people stop getting initially invested in shows that they're pretty sure will never get an affordable home release? But then they stop talking about those shows and the people they know don't check them out of curiosity and the cycle grows.
Could Aniplex possibly be at risk of reducing their shows' popularity by the continuing reputation of mainly only ever releasing collector editions physically and insisting that international licencees do likewise?
Or does the fact that they've got away with it so far mean that they're pretty much bulletproof at this point?