In Jade’s defense, only part of your seed is stored on their server and it’s encrypted. You could also build your local oracle server, so in theory it would never need to go online. 
I haven’t used Jade and don’t know the technical nuances, but seems to be similar to a ‘recovery’ option Foundation devices has, and even somewhat similar to the new BitKey, although bitkey uses 3 multistage (one on their server, one on your phone, one on the rock).

I think it comes down to preference. Personally I don’t like my hardware wallet to touch the internet at all, ever, but for newbies, not losing your seed, and ease of transactions, it may be OK…