I just thought wavetable synths were a compromise to addition synthesis.but given Serum is a wavetable synth it sure is popular. So it's like the Air plugins that PT has? Or Cubase's synth I forgot already, I'd just use Kontakt, or u-he or some 3rd party stuff in there anyways. My original curiosity came from that it was an additive synth, and I saw it had a vsti version, so I hoped I could use it outside of FL, and I could. That being said I STILL use some Image Line's other plugins mainly FX in other DAWs especially Grossbeat because it's ease of flexibility and drawing automation <3
It's my personal opinion if that wasn't the case Image Line's plugins would definitely be more universally used by people that don't use FL Studio. Lets face it, since a lot people are like me and want instant gratification by means of presets rather then to learn the ins and outs of what each individual plugin is capable of you end up with loads of people becoming used to the interfacing of certain synths that have loads of warezed libraries out there (i.e Massive, Sylenth1 and now Serum) which are all fantastic synths but don't necessarily do anything another synth by some other company can't do.
Regardless, since I'm pretty sure all of Image Line's Third Party preset libraries are both limited in number and come bundled within the DAWs license itself it makes it especially difficult to find warezed libraries. Literally in a few minutes you can have some really gnarly sounding stuff! Then duplicate/triplicate an instance and throw some multiband eq/compression or whatever other complex routing in there and boom you've got yourself a monster that competes with some of the most esteemed sound designers out there. If you check out Black Octopus' Mutate it demonstrates how easy it is to sample using a few simple wave forms and resample and resample until your satisfied within FL Studio using only Harmor and Edison. Harmor was a totally different beast though and I definitely had to try my hand at programming some presets just cause it allowed you to make neuro style bass patches with such ease and flexibility. That being said I loved the simplicity/presets of the native FX plugins built into FL Studio. It seems slightly redundant to do it all by hand. mostly because I find synthesis to be incredibly boring and nothing beats a good sound bank especially when you are trying to make stuff that's already sonically been made. They make some really fantastic plugins that go toe to toe with some of the more popular plugins but even when I primarily relied on FL Studio I stuck to third party plugs. I think it has more to do with the fact that it is an Image Line plugin.