Good to do experiment or enjoy sights seeing/tasting bliss of divine while on the highway of divine beauty but do always remember final destination in the back of head so one does not get caught up in these experiences..i won't say these things itself are trap itself as its simply reference points beauty of divine on the way...one should be cautious of their perception surronding them as attachement towards them can turn them into road block or hindrance...final destination goal in gurmat is beyond dasam dwara 3rd eye opening, anhad shabad ultimate goal of gurmat is get rid of five vices/pan chors, super imposed latent tendencies and egoic mind-thought/ego perception and realize our real self /shabad gyan that we have forgotten in avidya/ignorance as gurbani gives updesh-
Aapna mul pashaano (recognize your true nature/know thyself, the source substance/substratum of your very existence).
Man Tu Jot Saroop hai apna Mool Painchain ||
While I think #1 is mostly correct, I don't believe in self-annhilition. The being remains, but the ego, the sense of separateness from God, disappears. Also, I've heard in Baba Kartar Singh ji's katha that when a singh gets Shaheedi, the Singh is given the option of going to Sachkhand or of continuing to do seva in Maharaj's shaheed fauj. Baba ji met with some shaheeds in Karm khand who explained this to him.
Sorry, i forget which katha this is from.
As for other dharms, what i believe and have come to understand from reading bani is that, for the most part, they get what they aim for. Buddhists aim for mukti and nirvana, annhilation of the self, a state of no-being-ness, which is outside chaurassi lakh joon. There are also numerous buddhist and 'hindu' heavens. people live and die and get reincarnated from and into the heavens and hells, imu.
All of these stages are below Sach Khand, and when Waheguru wraps up the creation, all these things, including nirvana, will be destroyed, only sach khand will remain.
I asked Baba Takhur Singh ji Bhindren, when the journey of the soul ends, at what stage is the game finished? He replied that it never ends, which is why I believe that our being is not finished in Sach Khand and that our spiritual growth just keeps on going and going.
