I think an experienced user will just use Electrum or something else to manage their coins instead of relying on an exchange. It's such a start to move from a self-custody option to a centralized platform like that. Not to mention if HW is gone for whatever reason, then there's a higher chance that the platform is using software that has questionable security, too. If they use Electrum or something similar, then why would we have to rely on them instead of securing our wealth ourselves?
I thought Electrum was also a hardware wallet. Isn't it ?
Electrum isn't a hardware wallet, it's a software wallet for PC and android version is available and they are open
source -
https://electrum.org, verify the signature before you installed any package on your system.
If hardware wallets stopped working today, there is nothing that is going to happen, only people that refused to back up their seed phrase will be the ones affected because no seed phrase, no access to Bitcoin. Anyone with a seed phrase can open another wallet and spend their Bitcoin, send to another wallet or may decide to keep it there because Bitcoin are not store on the hardware, they are store on the blockchain.
My obky fear is that people might end up using centralized platform but the question we are not asking OP, why does he think hardware wallets is going to stop working? There is no any reason behind it, the company isn't dead to let theit business down, it's not just possible.