And I start thinking about bitcoin economy in general. The fewer people use bitcoin, want bitcoin, own bitcoin, the lower is price of bitcoin. The more people use, own, want bitcoin, the bigger is its price.
The price depends on supply and demand; not on the usability of a single hardware wallet.
A large portion of coins 'owned' by people isn't even stored in personal wallets of any kind (software / hardware) at all, but just sits on exchanges.
Also keep in mind that there are 'flashy, easy' software wallets that anyone can use very easily.
ColdCard, Trezor, Foundation Passport is not HW future. Just because your Grandma cannot use them.
Have you tried these? I only have experience with Trezor and Passport and both are incredibly easy to use. Passport even easier with Envoy on your smartphone; it doesn't get much simpler than that. I will elaborate in my upcoming review.
A good HW:
Has a large touch screen.
Why? This is just a signing device with secure storage. It has to have a screen so you can verify the transaction, but size and touch are unnecessary costs, make the thing larger, harder to conceal, harder to use without attracting attention.
It's manual doesn't contain scary words like Ubuntu or Python.
Hardware wallets don't mention Python in their 'Getting Started' guide. I don't think anyone is scared about a Linux icon on a webpage.
The only place I see 'Ubuntu' or other Linux distributions mentioned, is on wallets' downloads pages; alongside Windows and macOS. Supporting all major platforms is not unusual and common practice for all types of software. Are you arguing a good hardware wallet should only support Windows? And are you aware that some hardware wallets don't even come with their own client; so operating systems are not mentioned at all?
No bugs!
That's impossible. There exists no software without bugs.
It is so easy to set up and to use for anyone who can no more than just browse onlie and send email.
To use that HW is not more difficult than to use online banking.
It seems to me like you've never used a hardware wallet. These devices are actually easier to use than online banking.
What's most important is not that the device is as 'pleasant, easy, effortless' as possible, but that the device is secure. That requires open-source in hardware and software and that everything's verifiable. Bitcoin is all about eliminating trust.