Gear Acquisition Syndrome is tied to compulsive buying and hording, both are recognized illnesses (in ICD-11).

Of course, just buying an oscilloscope in the course of learning electronics is not getting you in psychiatry. I mean, it is part of the basic toolkit, plus, you are actually using it. But if you start buying 5 different soldering irons with 10 different types of solder, every kind of pliers known to man, some very specific tool for some obscure use case you don't have, etc... it can negatively impact your quality of life, for example because of the clutter.