According to Google's own calculations (in the email they sent about the price changes), this will increase our GCS bill by about 400% (and our entire Google Cloud bill by about 60%).
It would seem that we have until October to move elsewhere... :(
the biggest fear especially with this class of infrastructure (long term cold storage) is that they can make it too expensive to leave at any time by upping the retrieval / egress costs. How expensive is that move going to be?
At this point we are doing this with on-premise tape backup but that is in part because I'm yet to be convinced that we can trust cloud providers with this, especially since our future retrieval needs are unclear (some outlier scenarios could see us needing to retrieve substantial fractions of the data). Not to mention that even the coldest cloud storage seems to still be substantially more expensive than DIY tape archival (admittedly, not taking into account things like internal IT staff costs etc).