I don`t think there is a real case either for or against here regarding tracker action.
To use that hackneyed phrase its " horses for courses ".
As you correctly state some compositions technically are just not suitable for mechanical action. This seems to me to be a simple matter of fact based upon the limitations of mechanics.
Tracker action is certainly not a dinosaur. It should rather be regarded in similar terms to say, driving a Classic Car, preferably a Bentley. No synchromesh,no Bowden cables, no PAS,no heating - but what fun!!
There again,still making the comparison with cars; some people drive them in a better manner and with more results than others.
Tracker, pneumatic ( ! ) EP, Barker- whatever so long as it is well constructed and maintained it should remain a pleasure to play and I stress "pleasure " warts and all!