I have a 2013 Trash Can and it’s still holding up! Sure the system is limited with a peg leg GPU as the dual GPU setup never caught on. Even still the one GPU wasn’t bad!
Your work flow and needs is how I look at this. Having the fastest car won’t help you in stop and go traffics, and in the same light the time of processing you are doing on your system is how you need to look at and if it’s time to upgrade.