Joy Con Repair
TLDR; Joy Con repairs are free in the US and turn around times are less than during the holidays.
Not sure how useful this will be to others but I thought I should share my experience getting my Joy cons repaired.
During the holiday season, people were reporting a 2 to 3 week return time for their repairs, longer if it included the Switch console.
My Switch is out of warranty and I bought the Joy Cons in another country as the original Joy Cons that came with my system also developed drift. Recently, Nintendo has changed it's policy on Joy Con repairs and they're now free (in the U.S., at least. I'm not sure about other countries). This was possibly in response to a class-action lawsuit against Nintendo for the Joy Con drift problem.
My left Joystick was experiencing severe drift and the lock on the back was broken so it could slide in and out of place without much force. Both Joy Cons were loose. I applied for a repair on the service website on January 5th and got a ticket and free shipping label almost immediately. I shipped it out the next day at UPS and paid for the envelope but if you come with your own box/envelope they'll accept that. After a couple days, UPS tracking stated that the package was delivered. On the Nintendo Service status update website, it still said, "Due In." However, they stated that it's possible they received the package but have yet to update their website to "Received" and to just check the UPS tracking to see if it had been delivered. On January 11th, they stated they received my package and on January 12th, they sent a message saying they had been repaired and were on their way back to me. The repair was completely free, including free shipping both ways. I expect the package to return sometime this week. If it comes before the 19th, it took less than 2 weeks which indicates a faster repair time than those reported during the holidays. I will update when I receive them on the total time and condition of the Joy Cons.