While recognizing the value of encryption,
I have to admit I hate supporting it, particularly as a third party add-on to Windows. The encryption process itself takes forever, and runs the gerbils too hard. If power fails during the encryption you get to rebuild the whole drive. If the system glitches the wrong way during an update, if you are lucky you get to decrypt the drive and execute a software repair. If you aren't so lucky, you are trying to preserve the data from a dead drive before rebuilding it. Either way there's a long encryption time waiting for you on the other side. At the one company where I worked on the Encrypt All The Laptops Project we had about 1 in 10 laptops fail during the encryption process, even after doing updates and defrags BEFORE the encryption was started. Yeah, that was mostly due to hideously old hardware, unfortunately I'm discovering they were decent at updating at good intervals compared to other organizations.
Oh, and the particular software I am supporting at the moment bolluxes up the hard drive if I run defrag on it. Just love that after I've spent 3 tech hours and 48 clock hours getting the damned thing built.
If it were built into the OS from the get go, and you also work to resolve the portable drives issues I might be more supportive of the concept.