Great table. Enjoy!
Main thing to be affected by long use is the tonearm (its bearings).
Replaceable part but quite expensive.
Apart from it, there aren't many things that can go wrong.
Slider for pitch speed is easily fixable.
Check also the actual platter speed and the brakes, calibrate accordingly if needed.
Regarding the cartridges, these are both classics and no slouches.
I wouldn't listen to those dismissing them as non-upgradeable, 'DJ' items.
I own both and use them for music listening.
The 'DJ' moniker was nothing more than marketing, meaning high reliability and performance, higher output and maximum trackability.
These cartridges were oriented for hi-fi and professional studio use when introduced, being re-marketed as 'DJ' products much later in their long life.
For Stanton 500, you can upgrade with a nude conical offered by Jico (AE10192).
Pickering V15 Micro/Stanton 600 is also a really good cartridge that's still possible to find NOS styli for it.