I realized that it has now been 22 years since USA production of Radio and Amplifier vacuum tubes ceased. The current state of the Tube guitar amplifier market is actually booming. There must be at least 100 small companies (or individuals) offering tube guitar amplifiers for sale. Demand for tube audiophile equipment is also high. Thankfully, production of new vacuum tubes has continued in China, Russia and the Czech republic. I can only hope that should film production cease by Kodak, other international manufacturers will continue to supply us with film for years to come and that our analog method of photography will prosper in a manner similar to vacuum tube audio.