When and what was your last significant equipment upgrade?


I will start- December 2015, a DAC (Bricasti M1)

As I've said in the past, I truly believe I am done in terms of buying gear, but more recently I finally merged my laptop with my DAC to explore hi-rez audio, which I am enjoying a great deal
128x128zavato
Emotiva XPA-1 GEN 2 Monoblocks
Modwright LS36.5 DM Tube Preamplifier
EAT Forte Turntable w/ Moerch Tonearm & ZYX Universe Premium Edition cartridge.
Building and listening to my set of 4 Walsh speakers.  Next upgrade is the new and improved version of the same, in the same quantity.
Unlike the original Ohm's, they're a '2 way' with a smaller unit above the lower and larger driver.  The larger driver is slightly larger than the unit one sees applied in the German Physiks offerings, which is what I'm patterning them after.  And I can bi-amp them with a digital xover....
They're not perfect, but I listen to them far more than I do to my more 'normal' speaker array.  I've not noticed any 'listener fatigue either, which I can only experience elsewhere with my AMT's.