[accassar]

https://www.qubes-os.org/doc/anti-evil-maid/

[mrtesthah]

How about Heads?

https://osresearch.net/

https://forum.qubes-os.org/t/what-makes-heads-so-great-when-...

[sudohackthenews]

AEM is a little sketchy though, you need to trust a flash drive to hold it, and make sure that drive doesn’t get overridden by a malicious attacker. Your link goes more into depth about the disadvantages

[transpute]

In some threat models, it's more feasible to protect a portable flash/SSD drive than an entire laptop.

In other threat models, laptops/tablets/phones could be physically secured in a safe, or kept under direct physical supervision.

[sudohackthenews]

Yeah, that’s what I was alluding to. I think the OPs point still holds here- both of those are quite a bit harder than the built in Mac solution