I haven't bought any new ink this year but have been enjoying the inks I already have.
You are far more disciplined and focused than I am, and I sincerely admire (and I suppose envy) that.
If my spreadsheet is accurate, I now have a total of 361 retail bottles of 297 different commercially available inks, and soon it will become 381 bottles of 306 different inks when the not-yet-dispatched orders eventually arrive here. Still, I don't feel satisfied or that I "have enough"; if the opportunity arises to acquire two, three, four or even five more 80ml bottles of Diamine Jalur Gemilang at list price — but without having to pay expressly for international shipping — arises I'd leap at it. And I'd happily try Sailor Ink Studio #123, #143 and #162 on the same terms, even though I suspect I'd feel about as 'lukewarm' (if that!) about those inks, after having used them once, as I do Tomoe River paper.
As always: 1. Implicit in everything and every instance I write on FPN is the invitation for you to judge me as a peer in the community. I think it's only due respect to take each other's written word in online discussion seriously and apply critical judgment. 2. I do not presume to judge for you what is right, correct or valid. If I make a claim, or refute a statement in a thread, and link to references and other information in support, I beseech you to review and consider those, and judge for yourself. I may be wrong. My position or say-so carries no more weight than anyone else's here, and external parties can speak for themselves with what they have published. 3. I endeavour to be frank and truthful in what I write, show or otherwise present when I relate my first-hand experiences that are not independently verifiable. If it is something you can test for yourself and see the results, I entreat you to do so.