The lone I-85 Virginia shield (paired on a unisign with an I-95 Virginia shield) was still up as of last week. No date code anywhere on it. I don't know of any state-name Virginia shields still up on mainlines (the last state-name I-95s from the portion built in the early 1980s in Prince George and Sussex were all removed from the mainline by 2013) but there are still many on surface roads. I know of many I-95s, between Richmond, the one in Petersburg, some in Sussex County, and some newer installations south of Fredericksburg. I've also seen them for I-64, I-264, and I-195.
I couldn't remember where this lone I-85 shield with the state-name but I found it and it was still up as of Sept 2021. It and the accompanying I-95 shield are in rough shape...
I think it’s still there, but I’ll check to verify that later this week. Petersburg has been replacing lots of signs recently…almost entirely with incorrect shields. Almost all the VA 36 postings are now US 36 shields.
Google Maps shows that the only known state-name I-295 shield, on eastbound Greenwood Road approaching Woodman Road, has been replaced as part of converting that intersection into a roundabout.