I would not pay 119 euros for nono S plus because it's untested, closed source device and I bet it's going to have similar problems like terrible model X.
Double the price for a bit more memory and larger screen is not a good deal in my opinion.
I wouldn't buy it either. First because I couldn't care less about their DeFi and NFT support, and second because I don't need it to store my Bitcoin. The Nano S works just fine after many years. Yes, I know it's closed-source.
However, your argument that the Nano S Plus shouldn't be bought because it's untested can be used for any hardware wallet or any piece of equipment that is brand-new. It can't be tested before it's developed and released to the general public. So, I would like to expand on your thought process and say that you shouldn't buy any new hardware wallet by Ledger, Trezor, Passport, (insert company name), for at least a few months to a year to give those who know what they are doing enough time to test it and try to break it. Those who can do it themselves, even better.