There is literally none whatsoever. Genuinely no advantage. In actual fact it's probably a liability and a time sink over something new. Unless it was free or so cheap it wasn't worth turning it down. If you need a meter and choose one of these and fix it, depending on what your time is worth you could probably cover a nice new Keysight meter for the cost.
But much like a classic car, you're not in the market for a practical device but a piece of history or something which you couldn't have when you were younger because it was expensive or difficult to get hold of at the time, or just because the indefinable quality of owning something like it. It's a fun waste of time, and marginally more constructive than sitting in front of Netflix or taking drugs or something.