Today or maybe last night, the Keystone company decided to put an end to recovery seed control by the owners, here is the message I got from them.

Tell me friends, how does a seedless architecture sounds to you?
The wallet seed will never leave the chip, that's good but the user never know the seed is quite unique and stupid. I have never known any Bitcoin or cryptocurrency wallet, that does not give private keys or mnemonic seed to users.
With Bitcoin and cryptocurrency, reminders are simple and very similar: It's your key, it's your mnemonic seed, it's your coin.
Another important reminder is always back up your wallet.
Now, Keystore no longer want Keystore users to know about their wallet seed and have ability to back up their wallets. That's speechlessly stupid from the manufacturer and dangerous for users, if you ask my opinion.