[JFreak]

TL Space TDM is the best DSP reverb ever made and I don't see that any HDX reverb will match that easily.

Let's start with Avid ReVibe which we know can have two instances per one Accel chip, but only one instance per HDX chip. While TDM version took exactly 50% of a chip, the HDX version takes 78% and cannot share the remaining 22% with other plugin types (because it already used all of the memory available to the chip). Also latency of TDM version was 2 samples but HDX latency is 31 samples. To add to the burden, the plug lost the bright GUI and the II version looks just plain unintuitive to me.

HDX has advantages over TDM, but running reverb isn't one of them.