Office doesn't annotate well enough for law.
I think you need to be more specific than "the law". Our lawyers frequently use Microsoft Word for redlining contracts, works great. Sharepoint Document Libraries actually work really well for storing these. There are certainly lots of other systems that work as well, or better (ie Enterprise File Sync and Share Applications like Box, Syncplicity, etc).
Replace the electronics when it's actually dead or doesn't meet your needs, not just because it's not as shiny as it once was.
New high end smartphone is $200 on contract in the US. That's about $17/mo to have the latest, fastest phone with all the newest features. For a device that I use constantly and carry around eight to sixteen hours, that is essentially nothing. That's between one and a half and three cents per hour.
I understand everyone has a different set of financial circumstances, but for a device that useful, that we spend that much time using, why NOT have the latest and greatest, if it's well within your financial means? I'm not talking about buying a $100,000 car here. We're talking about $100/year for a device that most people use very frequently.
All extremists should be taken out and shot.