Two-prong outlets in older buildings: your approach

Pre-war and post-war buildings are full of two-prong receptacles, and the questions never end: when is a GFCI replacement acceptable, when does an open ground get cited, and what about tenant-supplied adapters? Share your building's era and what your inspector did with them.

Every older building becomes a museum of electrical eras: two-prong outlets in the units, three-prong replacements somebody installed on ungrounded boxes, and adapters in every junk drawer. The GFCI-replacement route is the one most teams land on, with the 'no equipment ground' label doing the honest talking. But inspectors apply it unevenly, which is why this thread needs real outcomes, not theory. On your oldest buildings, what has your inspector accepted for two-prong outlets — GFCI swaps, labeled no-equipment-ground, or did they cite anyway?