You can find the 5700 regularly at $279, I saw some just last week and purchased one a few months ago at the same price on Newegg. Now, that isn't AIB, so if something like the Asus Strix 5600XT drops at $279, it *might* be ok, but it still feels like these cards should have dropped with a slightly lower MSRP. At 10-20% increased performance of the 1660Ti, that still puts it ~20% slower than the 5700, but also at ~20% lower MSRP ($349 vs $279).
Overall, at $279 for a good AIB iteration like the Strix, Gaming X, Aorus, Taichi, etc, it's likely ok pricing, but picking up a 5700 when they are at $279 is still the best deal currently, and with a small undervolt, they are almost inaudible, I run my 5700 at 935mv and it's not noticeable over ambient sound unless it is absolutely silent in the room.