I have looked at available hardware wallets on the market. Almost all have something that I'm not happy with.
Ledger is NoNo, I'm not willing to support this company with a single penny/Satoshi.
Trezor One is pretty limited, same for PiTrezor; Trezor T too expensive for my taste. I hope a new Trezor with their own open-source SE chip isn't going to be with a price tag as model T.
Specter DIY is an interesting option for me.
Passport batch 2 looks interesting, too.
Bitbox02, well, not bad, but doesn't really outshine in my opinion.
Coldcard's recent move and future Mk4? Hm, not so happy and amused.
Other hardware that focusses on smartphone use or hasn't own displays is out of consideration for me.
I started out with the KeepKey because it was one of the cheapest open-source hardware wallets around, but I didn't really find it all that great. The GUI that used to be available when I bought mine was one of the reasons I didn't like it, and ended up using it exclusively with Electrum. It's no longer shipped with a user interface, because they're using it to promote their other product, ShapeShift. To be honest the company kind of gives me the creeps, even more than Ledger.
I've also used Ledger's Nano and NanoX, but I tend to agree with you about Ledger as a company in general. The fact that the wallets aren't open-source is a sticky point for me, but they really lost me when they let my personal information get leaked. Forget about sats, I wouldn't give them a fraction of ripple.
I just reserved my order for a ColdCard mk4, so I'm interested to see how that works for me.
My go-to HW wallet has been the Trezor, I use both the One and the Model T. I don't deal with altcoins when I can avoid it, and I have none that I'm holding so I primarily use them with Electrum as the interface, and both have been great. The only limitation I find with the T-1 is that it's not compatible with XMR, which really hasn't been an issue since I don't HODL monero, but I do like to trade some on one specific P2P platform just as a way to (slowly) grow my stash of BTC.
Just wanted to give a glimpse of my thought processes... (I don't feel a pressing urge to have and use a hardware wallet, yet.)
As long as you know how to keep your coins (seeds) safe, a hardware wallet is just nothing more than a good way of keeping your coins mobile. If you don't need the majority of your wealth to travel with you, then cold storage is more practical and more affordable.
To me, I think a Trezor One with secure element would be worth like $200 or 200€, but the current model T price tag is already around the 300 mark, without this new custom chip so I won't hold my breath.
You correctly figured out that most wallets have one problem or another; not open source, no screen, wireless connectivity, price - so even though at first glance hardware wallets seem like a pretty exhausted field after so many years, I'm pretty excited to see what the next months and years will deliver and if we can get the perfect device.
Wow, I had no idea that the Trezor models have gone up so much. They used to try to keep the price point competitive with Ledger, but I guess there's no point in that since Ledger shot themselves in both feet in recent years.
As for the "perfect device," I don't think you'll ever get a consensus on that one. You can ask ten different people what they would consider the prefect hardware wallet, and you'll likely get ten different answers. Hardware wallet manufacturers' primary marketing demographic isn't the technically astute, so their definition of the "perfect device" is more likely to result from how well it sells and how user friendly it is. That's not likely to coincide with your definition (or mine.)
Do note, regarding SeedSigner and having to store the seed 'in the open' in your home, that any device without secure element is doing just the same. Software wallets and hardware wallets like Trezor models without SE (including PiTrezor), basically store the seed 'in the open' as well, just digitally.
The question whether this is a potential attack vector entirely depends on the circumstances: where will the device be stored, where will it be used, by whom will it be used, how often and does someone have access to it for longer periods of time unattended? In some cases it will be better to have a fully open device (but without SE) and in others you rather put some trust in the SE to be benevolent to in turn get almost guaranteed protection from technological attacks by malicious parties in your surrounding.
That's a good point about seeds being "out in the open." I'm don't have the technical knowledge to what makes a "secure element," and whether it would be open-source or not. But if not, then I'm inclined to keep using my Trezor with a strong Bip39 passphrase to encrypt the seed.