Some of the errors made in the early design of the C64 make it so much less convenient than it could be to use. A less stupid disk drive system, an OS that doesn't assume LOAD is for the Tape drive... Just those two things would have made it more pleasant to use. There's a lot of software that doesn't work with 2 drives plugged in, or loaded from any other drive than 1, because of the aggressive fast load routines that were developed to compensate for design issues.

But I just set up a disk with some productivity software, for shits and giggles, and yeah, it can be surprisingly not bad for these kind of tasks.