I opted for the 128GB SSD in my MBP (last 17" model, from late 2011) and a few years later I added a 128GB ExpressCard SSD, which i use pretty much exclusively for (largely Linux, largely via Vagrant) Virtual Machine images. Sure, I'll definitely order a bigger built-in SSD on the replacement, but on a newer machine without ExpressCard you could also use a USB3 flash drive or (if you are on a mac) a Thunderbolt SSD device.
On your model you can even opt for bigger main SSD and probably replace dvd with another SSD like this: https://www.ifixit.com/Guide/Installing+MacBook+Pro+17-Inch+... . Oh the sweet upgradeability! <3
I have plenty of disk space but my photography hobby is eating most of it and the first thing that gets thrown away is the 14 Gb vmdk (this time it's Windows 8.1 + IE11).
Next one is probably 8 gigabytes of MS Office 2016. How can Office eat 8 gigabytes? :D (Compared to LibreOffice's 700 Mb or Office 2011 1,3 Gb.
And why worry about the new IEs and Edge? Microsoft says they support standards and so forth ... ;-D
At the time we were supporting XP+IE6 for a client so this worked great for testing older browser versions, and prevented each developer from having to install their own local copies. Just RDP over to the test box...