Well done for persevering, it's a much better spec than you started out with, has room to grow into as well.
If you experience any issues, the expected lifetime of a system like this would be 7 - 10 years with one or 2 gpu upgrades during that time, a lot of people will get issues and think they need to replace the PC, but it's more often than not a software issue that can be easily corrected.
If you face any issues, you're always welcome to post here for some help, or of course you can phone PCS at any time and they can help out.