Windows 10 should have all the drivers you need built in.
As for time, 3 years is generally the dividing line between supported and "end of life" or "legacy". It's used by most other vendors as well - apple in particular. You can in fact not buy a warranty longer than three years on Apple hardware -- at 3 years old, Apple calls the system "ancient history".
And the L702x series is about five years old -- so it's long been end of life.