Pretty much everything, I can get any type of sound that I could get with the wong with what I already have and regularly use (Softube, PG, IK, Kuassa, ReValver Amp Clones) It was good/nice, don't get me wong(?) just that it didn't really add anything for me. I'm trying not to overlap these days, so unless something is just a 'must have' for me, and can do something that what I have doesn't, or does it so noticeably better, I'm not going to bother.
I started thinning out the herd back when I gave away the PA stuff, and since then have sold or given away quite a bit more, only want to keep what I'll actually use and use regularly.
Done the same with my drum stuff, sold Superior 3 and 2 and EZ Drummer and AD 1/2, just kept BFD, and Bass stuff, kept MODO, gave away Trilian, purchased EZ Bass but gave it away soon after, MODO sounds better and doesn't require as much of you, I only use it for sketching, in the end the Bass is played with a real bass.
If I need to reinstall before I leave this mortal coil, there won't be so much to install and set up, only that which I need and actually use.