Audio Units Vs Vst (mac Vs Pc?), long term direction for virtual synths Options

[Seth]

[Couldn't find existing recent posting on this topic - hope this isn't redundant]

As a long-term Mac user, I'm a little unsettled by the apparent drift towards a VST/PC-centric support model for virtual synths. I see several new players in the audio/midi sequencing market on the PC (e.g., FL Studio, Synapse/Orion) that support VST and some indications that newer virtual synths may be targeting VST/PC.

Somebody tell me that there's nothing to worry about - that audio units on the Mac will be around "for ever". I'm thinking about getting some more Native Instruments synths (have their Absynth plus Spectrasonics' Atmosphere) but beginning to wonder about direction over the long haul. Stick with DP now that I'm finally getting the hang of it? Or, horrors, consider switching the music stuff to my highly capable PC, now just serving time as a game player.

Seth