Surveying pre-Gupta inscriptions, it becomes clear that the aspiration for nirvana has one recurring feature attached to it; the aspiration of the donor for the attainment of nirvana — whether for themselves or others — occurs when the donation is connected in some way or another to the relics or figural or non-figural representations of the historical Buddha.
This suggests that the idea of being in the Buddha’s presence grew in importance in relation to the efficacy of religious practice in this period.
The same ideas can be seen emerging in the later canonical Pali Apadana, and connect to developments in the emergence of Mahayana.