FYI, You can replace the keyboard on a 2011 MBP; I've done it. Fiddly but not especially difficult. The 3rd party keyboard I replaced it with isn't as good as the original (in particular the backlight is very leaky) but it's not bad and gave the machine a new lease of life...
I also have a 2011 and still running El Capitan because I was concerned about how it would handle updates. What version are you running right now and how much RAM do you have?
I have a 2011 iMac that's running High Sierra (its last supported release). I upgraded it from its base 4GB to 20GB of RAM.
Since getting High Sierra, everything's been really smooth, but the Sierra -> High Sierra upgrade actually bricked my computer. It was perpetually stuck in the installation phase, bailing after 45 minutes because it couldn't unmount my partition. To Apple's credit though, after I used recovery mode to reinstall the OS, everything worked and my data was intact.
Perhaps when the keyboard fails, someday, I’ll replace it, instead of just upgrading the RAM and drive.
Kidding aside, I would like to get a newer version someday with better screen resolution and size, but Apple seems to have many missteps to recover from the last 5 years or so.
I’m assuming an implied “/s” at the end of your comment.