Of course it all depends on what you have in your plugin collection. The reality these days is that most developers offer VST3 versions including: Acon Digital, Sonnox, SSL, Waves, Voxengo, IK Multimedia, Blue Cat, Melda Production, Klanghelm, Izotope, Softube, Nugen, Antares, Fabfilter and many others. A notable and surprising exception is Native Instruments who do not seem to want to update at all (in my opinion a backward decision).