Not me but, there seems to be a hip surgery required epidemic.  I can honestly name at least 5 friends who have had the ACL I think repaired.  I’ve heard so much about it I can tell you there are a couple ways to do it and the benefits and downsides of each.
Average cost appx. $4500.00.  I’m told the first thing the vet tells them is, you will be back in 6 months to do the other knee and, in a couple cases they had to go back.
That was suburbia, now I live in the country and when I tell them boys $4500.00 for a dog you can imagine the comments.
Each to his own.
It’s not uncommon.