Majority proponents of Advaita, only know of śankara's advaita-vedāntavāda. But according to us, in the pure mystic tradition of, trika initiated & continued by Mahādeva, his viewpoint is not the finest. Parādvaita of śiva is the supreme and subtlest darśana of advaita satya.
The Parādvaita, the transcendental non-duality, is only for the one graced by bhagavāna śiva himself. Not for everyone. Only a few rare beings get the opportunity and ability to grasp the mysticism of śaiva that predates all other traditions. Then why did this finest knowledge of advaita not become very popular in the saṃskṛta learning centres of the ancient times such as kāñchīpuram, śṛṅgerī, vārāṇasī, etc? Because it is not for the average person. You have to have tremendous puṇya to be receptive to this. guptapādācārya says : केतकीकुसुमसौरभे भृशं भृन्ऽग एवं रसिको न मक्षिका। भैरवीयपरमाद्वयार्चने कोऽपि रज्यति महेशचोदितः।। Only a black bee gets drawn helplessly towards the enchanting aroma of the ketaki (pandanus) flowers, not the honeybee. Just like that, only the exceptional beings who are instilled with such thirst by Mahādeva himself, become receptive to the param advaita system of bhairava.
MahaDevanGiri.