We have already seen it with other hardware wallet brands and recently with Trezor as well. Once the Trezor Safe 5 came out, they abandoned the Trezor T. And it's not even their oldest device. You can't buy it from their shop anymore.
This is not true, plese don't share false information without checking first.Everyone can clearly see Trezor Model T available in their store and it can be purchased for €77.2 with 40% BLack Friday discount.
Just to make sure I went agead and adde Trezor T in my cart to test if I can actually purchase it, and I can.
https://trezor.io/store
OneKey on the other hand did discontinue some of their old devices, same as many other hardware wallet manufacturers.