No demon is history has reached the level where you now reside, you have surpassed all Demon Weaknesses and it would take complete obliteration and nothing less to kill you, nothing can weaken your strength or regeneration anymore. If even a single partial cell of your lives you can reform from it in under a second. You now no longer need to eat humans to grow stronger though it will give you significant boosts in power, you passively gain strength for every day you exist. Where once the sun would signify your weakness and your need to hide now it signifies your ever growing strength. You are many many times more powerful than you were as a progenitor, your strength is enough to level mountains with relative ease and even islands when pushed. Your speed is now around 10-12% percent the speed of light. You can now easily make demons on the level of Muzan. Your demon's weaknesses are weakened but still exist until they reach a Muzan level of power, even then you may choose whether they keep them or not.