Your high horse is getting tired...
Back in the day we had a 4GB limit on the Exchange mailstore. Not per mailbox, but for the whole database. Sure, at the time that was a lot, but when you have 100 staff in a solicitor's office, it's amazing how quickly it goes.
"Well you can pay for Enterprise, or we can extract the data to PST, but please be careful with them" becomes "Well you can pay... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee... or we can extract... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee..." which is quickly answered by "the second one".
Also, bear in mind that around these parts, partner solicitors don't draw a (meaningful) salary, but take a split of the profit at the end of the year. So when you ask them to pay for something, that's taking money out of their pocket.
This story is agonisingly familiar - I have been the miracle-worker for this kind of crap more times than I really want to consider.