Mathematica is at least ~$1.5k/year, ~$3k if you want only the desktop application, no WolframAlpha-like features. Licenses on the desktop are not per user, but per machine (8 core limitation). If you want to move the installation to another machine, you have to send them a signed document and contact Wolfram (the company, not the person). I could go on all day about the friction and restrictions.
They have an excellent and unique product and I would love to pour them money (between me and my employer we pay about EUR 1000 /year to Intellij, and this is only one provider). But for some reason I do not feel comfortable between the immense power imbalance between them and myself. It makes me uneasy to invest in the ecosystem.
I wonder how many clients they have their CAP users in the academic world.