It takes time to get the bugs out of a new product. This is true in the world of guns, cars, computer software, and any complicated consumer or industrial product. Hop into the TARDIS with me and I’ll illustrate my point. In 1983, I bought a BMW 318i. It was a brand new model in its first production year (nominally 1984, but they released the cars early). Mine was number 54 in the production run and probably arrived on the first boat from Bremen, which should have been enough of a warning . . .