I used XTRAX on four songs recorded in 1974 (in a semi-pro studio) and it did a fair job. Mind you it was only for the purposes of extracting the vocals to be used as a guide track for a new singer (the original singer is now off the grid so to speak). But we three (bass guitar & drums) were going to re-record our parts for gits and shiggles.
At a cost you can "somewhat" unmix a song using either Acid Pro or XTRAX STEMS. They both produce a bass, vocal and "others" separate tracks.
Again depending on the source material it can either be good enough to use as a guide to record replacement parts or it can be utter $h^te.
Nothing on my system gathers dust, else the hard drive won't work anymore.
On the other hand, those things I don't use do take up space. My samples drive is 8TB and I've only about 1.5TB free today.
The down side of my mobo is no USB 3 (I put a PCIe card in it) and 32GB max.
I could only hold 2 UAD cards (both are quad core) . So I bought a UAD Octo USB Satellite.
Assuming my employment sticks through the end of the year, a JR/Purrfect Audio machine will be my XMAS pressie to meownself.
My 9 year old mobo is still working even after upgrade from 16GB to 32GB and 1TB SSD boot drive. Samples and project drives were replaced too.