Depends on how you have treated and maintained it. LR's like maintenance. They are VERY unforgiving if not maintained properly. You sound a bit paranoid about having "problems"...
The usual things to go first would be cruise control (vacuum lines), ABS sensors, O2 sensors, and a handful of other things depending on how you use your rig. Off road a lot? There is a whole different list to run down if you do. If you are not a DIY kind of guy, then get to know a reliable LR mechanic. Specifically someone that has worked on them before. My suggestion is to not go to the dealer after your warranty unless you have very deep pockets.
But really nothing at this point (50k miles) to worry about. Just usual maintenance. I have 92k on my 96 D1 and have just maintained it regularly, replaced worn out or faulty parts and have had no mechanical problems whatsoever. My CC doesn't work but I don't really care and live with it. Just a few electrical problems but that is battery related.
You may read about a lot of problems on DWeb but that is what it is here for! Most all LR owners know of DWeb and use it to fix their own rigs or at least get a diagnostic so they know what to tell the mechanic. They really are not THAT bad...