Yeah, the age thing is tricky. The progress curve does shift. It gets really bad after 35. You have to do more to gain less. BUT, you can still gain. I reached my athletic peak at 37. But if i had put the same work 10-15 years ago, who knows where i would be. But yeah, 31 is not much, you still have a couple of good years, hit them hard. After that, it all depends on your ceiling. How much room is there left? If you got some room, be sure you can keep progressing. You may never reach your peak but you can still improve. So if your potential is 100, and you are now at 70 or 80, yes, you can improve and go 90. If you are already at 90+, maybe that was it. One way to find out, go get it!
2c