It is getting better though, which means that long term, FL Studio may be the better option. In terms of plugin compatibility, FL wins that little bit more, because they’ve support VST3 a lot longer than Ableton has, and they now support Audio Units and VST, which they previously didn’t.
When asked “What are the best DAWs?” the answer is simple. Reaper is ranked 1st. FL Studio is ranked 3rd. People have several reasons to prefer Reaper over FL Studio. The most important reason for choosing Reaper is simple though. With Reaper you cannot only make your own themes, on top of that you can also configure the Reaper interface to best suit your personal needs. There are no limitations when it comes to customizing or programming Reaper.