People who purchased Nano S devices in 2017 are starting to see first issues now, that means cheap display is probably meant to last 4 years more or less.
I guess I could soon be affected then. I think I got mine somewhere in 2017/2018. So far I haven't noticed any screen issues or problems with the plastic cover. I am generally not a person who breaks electronic devices because he drops them or carries them in his pockets, so I don't think those types of things will affect me.
I did update the Bitcoin and Ethereum apps yesterday and was surprised when I noticed that the usual "update all" button was greyed out. Couldn't figure out why until I noticed the difference in the app sizes. I had to uninstall a third app I had to update those of BTC and ETH.