I think that comment is not accurate.
Unlike a computer, a simple piece of equipment like a smoker does not become obsolete merely because time passes. If a cooker is well built and functions properly, it has intrinsic value that doesn't depend on what happens with the company that made it.
For example, I see you are a fan of Backwoods Smokers. By this line of thinking, a shiny new Competitor purchased today would be "worthless" if Mike retired next year and chose to close the doors. That just doesn't make sense to me - a good cooker today is still a good cooker tomorrow as long as you take care of it.