If it’s a government type place, I can say that I can access the VIA site and connect to and update my keyboard. However, having a keyboard that allows a text file to be saved on it would probably be against policy, so I’m not sure that would even be a good workaround.
Depends on your needs. If you actually use the mumpad a lot because you are an accountant or just do a lot of data entry, yeah, keep the mumpad. If you’re not actually using it much, then it’s really not that big a deal. You can also get a separate numpad and use that for the times you do need it, then move it out of the way the rest of the time.