I have a 2015 MacBook Pro 13 (bought Dec. 2016), and it still runs GREAT.
I -WOULD NOT- trade it for ANY of the "latest and greatest" MacBook Pro's, considering all the user-reported problems I've seen with them.
OP -- if your MBP is acting "sluggish", then it's time to find out WHY, and fix the problems.
Here's something quick-n-easy you can try as an experiment:
- Open "users & groups" (system preferences)
- Create a NEW user (for test purposes). BE SURE you give it administrative privileges. Give it a simple name ("test"?) and password. It's only "for testing".
- DON'T put anything into this new account, other than Apple-provided software
- Now, log out of your "regular" account, and log into your new, "test account".
- Do things "get snappier" if you try this?
- If things suddenly "run better" logged into the test account, then it's something in your "regular" account that is mucking things up.
Doing this will "hurt nothing" and if you wish, you can just delete the test account later on.
I WOULD NOT "wipe" any Mac without some kind of backup.
Do this, and you may end up a VERY unhappy user.
If you have a spare drive, you can download either CarbonCopyCloner or SuperDuper and create a bootable cloned backup. Both are free to download and use for 30 days, so doing this will cost you nothing.