Agreed. The visualizations are very nice. I'd consider purchasing a copy for $150-$200 if it would give me one year of free updates, but I simply don't do subscription models without any kind of fallback license anymore.

I really dislike the idea of justifying eternal subscription cost models because of "ROI".

Every tool has an ROI, but you don't see photographers paying a monthly fee to use their camera, you don't see electricians paying a monthly fee to use their oscilloscope, you don't see carpenters paying a monthly fee to use their table saw, etc.

And this isn't Kickstarter - I'm not interested in investing in features/upgrades that the application might get at some point in the future, I buy software based on the feature set that it currently has.