Bruh… Transformers have been in almost continuous production in one for or another since 1993. They were briefly discontinued in the late 80s and early 90s, and were brought back with the Generation 2 line and then Beast Wars. The longest period that Transformers haven’t been on the market since their introduction to the US market was between Generation 1 and Generation 2 from 1990-1993. Generation 2 fizzled in 1995, and was replace a little over a year later in 1996 with Beast Wars. Since then, the brand has had some continuous shelf presence.
And it’s a huge brand today that is largely sold to adult collectors with an attachment to whichever show or comic they indulged in as a kid. Yes, discontinuation can definitely drive nostalgia and a desire to collect something, but it isn’t a necessity. In the case of Transformers, it’s just created an ever-widening pool of things for new adult collectors to be interested in. Right now, there’s a growing interest in modern updates of the Unicron Trilogy characters (Armada/Energon/Cybertron), which were shows being aired from 2002-2005, followed by Transformers Animated and the Michael Bay films.
Action Masters were hot garbage. Especially since some of them managed to somehow have even less articulation than their original transforming counterpart, which is saying something.