'It is similar to buying DAW software without record function.'
No it really is not at all similar. Record is essential, this is a 'nice to have'.
So your NI use case has been put to bed (you need to lobby NI for VST 3). So what VST3 plugins are you using right now that needs this? What exactly are you trying to achieve right now?
To be honest I'm not seeing this feature request every day in these forums. Yes if you want it you are going to pay for an upgrade. Just like everything.
Now you may have a point that perhaps cake need to specify better that it is not fully VST3 compatible. I'm not sure if they do this or not. Over to Noel.