I'm not building this new PC exclusively for CAD use, it's probably more geared toward editing GoPro footage, which this current machine basically refuses to do, but having it for SolidWorks as well will be a nice little bonus. I watch YouTube videos where people have Instant3D (I think that's what it's called) enabled and that's something I can only dream about on this PC, but hopefully the new one will make that dream a reality.
My current PC has only Hard Disk Drives but I have a 1TB Samsung SSD for the system drive of the new PC which should speed things up considerably (or so I'm told), plus 8TBs of file storage on HDDs, plus a further 10TB on separate drives for backups (damn GoPro footage eats HDD space for breakfast, I have 128GB SD cards for the camera and they only hold about 2 hours of filming in HD)!
Anyhow, I'm running SW2017 on Windows 7 x64 and it freezes up all the time, especially during renderings, but I suspect it's because I have a really old CPU and graphics card and no OpenCL whatsoever.
Although I do think there is one bug in the software, but it only happens on trying to do the first edit (of any feature) on an existing part, where the whole program goes unresponsive (as in greyed-out) for 5 or 10 minutes. It never happens when creating a new part, and it only happens on certain existing parts, I reckon it may have something to do with the file being corrupted though, like SW has to stop and repair something before you can work on it? I used to use task manager to force-close SW all the time when this happened, but found it doesn't help because it just does it again once you restart the program anyway, so now I just walk away and make a cup of coffee or something and it always comes good eventually.
I've done a few things in sheet metal myself, one was a copy of an Alphacool LCD Display...

...and it's interesting to use the "Flatten" feature...

... but I've since abandoned the sheet metal route and redesigned the whole thing for a 3D printer instead so that was time well spent (not). 
I seriously doubt any one person could possibly use all the features in SW, I'd guess I would've spent thousands of hours using it so far and I still discover new features all the time, damn it's one complex little piece of software!