On close examination of 2020 model at dealer I notice wheel wells are not lined with typical hard plastic but rather have a very flimsy pre-molded felt type liner (maybe for extra sound deadening). My concern would be that rain, snow, mud, etc would be bound to make these things rot very quickly. Yet it seems like to obvious an issue for Toyota to overlook. Am I nuts? Does anyone have any experience so far with how these felt liners being are holding up?