In the end VST 2.4 will just die out, and that day has come and it's soon.
You're talking out yer a$$, Freddie. You don't have a frickin' clue, but that doesn't stop you from arguing with Noel, of all people. Seriously?
VST 2.4 is not going to die out. Period. DAWs already support it. Do you think they're going to rip out the VST 2.4 code because it's no longer fashionable?
I will concede this one point to the VST3 evangelists:
if all the plugin vendors decided to abandon VST 2.4 and sell only VST 3 products, then yes we'd be in trouble. But the same thing could be said about AAX, AU or RTAS. Are you losing sleep because SONAR doesn't support Audio Units and never will? Do you know there are AU-only plugins out there that
you can't have?
Plugins are a small market. Software vendors must broaden that market as much as possible by offering multiple versions - 32 and 64-bit versions, VST, AU and RTAS versions, light/free/demo and full-featured versions, plugin and standalone versions. There are exactly
two vendors in the world that might be so arrogant as to not do so: Steinberg and Waves.
Let's not forget the salient point in all this, which is that VST X is an interface specification, nothing more. It sets the rules by which two pieces of software exchange data. That's all. It does not dictate what a plugin can or cannot do internally any more than TCP/IP dictates what you and I can type here. A well-designed interface is inherently extensible, meaning it's capable of being adapted to things the original designers didn't think of. VST 2.4 is extensible. There is no intrinsic reason it should ever become obsolete.
So no, VST 2.4 is not going to "die out". Even if it did,
there is no basis to assume that VST3 would be its successor (other than "3" is a higher number than "2.4"). Rest easy, Freddie. You have nothing to worry about.