Speaking as someone who lives near Amish country, with friends who enjoy carriage racing... Yes, lots of people do.
It's not certain that much knowledge has been lost, although much of it is in "endangered" status of preservation. There's a kind of silk netting made from the hairlike tufts of a certain species of clams, only practiced by two people IIRC.
Some lost knowledge is being rediscovered. A well-known example is making Damascus steel; it's now so ordinary you can order it online.
It's not certain that much knowledge has been lost, although much of it is in "endangered" status of preservation. There's a kind of silk netting made from the hairlike tufts of a certain species of clams, only practiced by two people IIRC.
Some lost knowledge is being rediscovered. A well-known example is making Damascus steel; it's now so ordinary you can order it online.