Glad you got them to do something. Those reports about problems are in deed true, at least in two cases I know of. Increasingly they are asking for proof that the customer was the original purchaser, ( although that was not part of the original warranty in the 1970's, it WAS put in later) Additionally, they have reportedly run out of some parts and have been slow to resupply.
Much of the equipment for the patriot pistol production was destroyed in a fire and they simply refuse to do most warranty work on those pistols, despite the warranty. (I also took notice that suddenly the prices of used patriot pistols has dropped to about 2/3 of what they brought a year ago. In fact you couldn't find one to buy for love or money for several years and now they are for sale all over.)
In the 1970's I purchased a set of life time warranty tools from JC Penny. The ratchet just went bad. You think Penny;s will replace it?
TC is going the same way. Cease production of side locks and eventually claim, like the Patriot pistol, that parts aren't available.
Not that that is a legal defense, but many will just accept that and look for a new gun.