Comment by simoncion
> I don't think you'd have to consider migration all the data from Pivotal...
I do. You might not have demands to migrate all data from all of your potential customers, but far, far more people than you might expect treat their issue tracking system as a system of record and external memory for a HUGE assortment of things.
One hugely (and obviously) useful query chain that such a system answers is "Hey, this customer problem sounds familiar. Did we investigate it before? Did we solve it? If so, how? If not, why not?". For long-running projects, it is impossible to select the correct 10% of data to retain to also retain the ability to reliably -er- service those query chains.
Obviously I meant 10% of all customers would hypothetically migrate from Pivotal to this new imaginary service, not that 10% of the data from each customer would be migrated... So 100% of the data migrated from 10% of the Pivotal user base, pretty generous assumptions I think.