Passive Radiators(PR) can’t be considered as better technology compared to ported or sealed. Its not a new technology as well.
Passive Radiator subwoofers got some disadvantages as well.
Its maximum low frequency (-3dB) is higher compared to ported design
Difficulty in tuning passive radiator designs as they have much higher mass than an equivalent port
It is possible that when the powered subwoofer cone stops, the passive radiator's cone continues to move for a short period of time and may cause the powered driver cone itself to move after the signal has stopped. This so called "ping-pong" effect can cause distortion.
If passive radiators are superior, why some brands are making PR as well as ported subs.
I also wants to point out that port noise / distortion etc. not observed on subwoofers like SVS.