Single-sig via Blockstream Green only, or single-sig via any third party software (such as Electrum)?

As squatter has said, I understand why some people like using multi-sig and 2FA, but I am not one of them, even with software wallets. With a hardware wallet, it makes even less sense to me and the attack vectors which I am most at risk of. Even if I can set up a 2-of-3 configuration in which I hold 2 keys and can therefore spend my funds immediately, all I am doing then is paying additional fees for little if any added security. If I'm buying a hardware wallet, I want to be in full control of the funds it is protecting.

In the wake of the Ledger database leak, what will be your policies regarding retention of customer information?