I don't see anything wrong with subscription business models inherently.
Nothing wrong at all if there is a choice. For businessses, it can make sense to rent rather than buy outright (as already detailed earlier in the thread). Personally, I've been stung by not having access to data from a decade ago only because the relevant app no long works (sometimes through lack of foresight (mea culpa) but also through a subscription expiring for maintenance on a lifetime license - that one hurt).
A subscription pretty much makes a mockery of any data archives you have, because at some point that subscription will stop for any number of reasons (some beyond the user's control).
or because you think the price will jump significantly
I think what is going to happen is that subscription software will be on a par with buying outright for a while. That is, the subscription price over three years being around the same as the outright price. Hard to argue with that (although I have offered a vendor five years subscription as a one-off price for a non-subscription license, and got turned down). Once most software is rented like this (and it will happen - as vendors see the turnover of the subscription-only vendors, they'll want a slice) then any relation to an outright price will be lost, because there won't be an outright price to compare against. And then $10/mnth will seem peanuts so it will creep up and creep up, and pretty soon we're paying far more in real terms than we'd ever have pain off-subscription.
The brain damage comes in when...
Undoubtedly that, yes. But also when one quibbles about a subscription and gets told "Well, it's only $1/mnth - not even half a cup of decent coffee". Sure, that might be, but add on on the other 'only $x/mnth' subscriptions and you can be spending half your salary like that. It's one way that people get into serious debt, and in this case you can't stop the subscription because then it's bye-bye to your data or livelihood or whatever.
I have strong feelings about this, in case you hadn't noticed