Why does FX release so many models? The simplest explanation would be that the more models the have, the more people they appeal to, the more they sell and sales equal profits.
While I'm sure that FX likes to be profitable and successful I don't think that is their sole motivation.
Developing and maintaining multiple products is very expensive. Most companies design a product and milk it for as long as they can, adding cosmetic changes or minor improvements to keep the money flowing.
I have a variety of popular airguns including FX. I have been pleased with the FX's I have so I've been watching the company closely and like what I've seen.
Why so many models? To cover the disciplines that people want in the configurations that they prefer. Bonus is that most can be changed to suit new requirements.
Why so many variations? Continuous improvement and because we ask.
Take the Impact for example. The original was a 30ish fpe pellet gun. People wanted more power, FX released the MK2. Slugs became important so the MK3 and then the MK4 were released to address those needs. It's what we wanted.
The Panthera designed for those who wanted to compete in PRS matches. Some people wanted the new valve in a more traditional format so that spawned the King.
The DRS series features the over the barrel air reservoir to address barrel stiffness. I like my light weight Classic, others more inclined to competition prefer the PRO. Synthetic, wood, tactical, or Pro - lots of choices.
The new Leopard incorporates a bunch of the recent improvements into a bullpup that I believe is to replace the Impact line.
So, FX is not resting on their laurels, they are investing a pile of money into research and development... and people complain there's too many options.
While I'm on a rant, I get tired of the complaints...
People also complain about the price where a search of Pyramyd Air shows that FX models are competitive compared to similar models of other brands.
There's all kinds of OPTIONAL accessories for customising the FX products... instead of being appreciated that's another source of complaints.
Too many o-rings? Each one is there for a reason, don't like it, buy a simpler design.
People seen to forget that FX manufacturers airguns for the TYPICAL CONSUMER. That these airguns are capable of being raised to competitive levels is a bonus. Those who want competitive match grade airguns will need to invest time and money to upgrade or contact companies who make custom airguns to cater to those needs.
Anyway, done rambling - the soapbox is free.
Cheers!