That thread by theymos shouldn't be viewed as a recommendation of which brands to use. It's more of a general guideline of what is out there. The whole point of his thread was to warn users from staying clear of online accounts and custodial services. So when he does that, he mentions all other ways of storing coins that are better and safer than using online accounts. Unstoppable Wallet belongs on that list.
I seriously doubt theymos has done any testing of the Unstoppable Wallet either. I don't see him as an altcoin guy, which I believe he has stated many times. His recommendation is probably based on the fact that others recommended it also and he took note of that. When he talked about hardware wallets, he mentioned only Trezor and nothing else. I am sure many would agree that Trezor shouldn't be the first or second choice anymore and we have better options, like Coldcard or Foundataion Passport, but theymos doesn't mention those. There is also no mention of paper wallets or airgapped devices.
That topic of theymos is a general overview of the easiest ways to abandon custodial services and start controlling your own money.
