Not practical when one makes any type of transaction regularly. For those who don't want to research or generally trust HW wallet manufacturers, they can easily make their own though by using an old offline device and sign the transactions there.

People should do better research before buying things, and - it should go without saying - especially when it's about security. Ledger has a whole list of issues, they became the most popular brand not because they're the most trustworthy but because of their marketing and focus on supporting a massive number of coins. You'd think though that security should be the number one priority for a hardware wallet brand, not convenience.

A great option if you can do ECDSA operations in your mind :)

If you ever go through TSA with this type of wallet they can read your key off the scanner.