For the devotees who are aspiring to attain love for Krishna, He is very careful about what He gives to them. For this reason we find in the Bhagavatham that the material desires of devotees are sometimes fulfilled in the dreams only and not in reality. The Lord is awaiting to receive His devotees quickly without any delay. He doesn't care for any processes like leaving the body at darkness or light to leave the material world as in the case of yogis. He Himself comes on His carrier Garuda and picks His devotee without any delay.