While supporting IE without any developer work is very impressive, I think quik has some limitions: 1. requres a lot of bandwidth, a place using IE has a high chance don't have a modern internet infrastructure, thus limiting concurrent users. 2. Playing video is basically impossible because intraframe compression is just not efficient enough even on a good network.
Anyways, happy to answer questions or talk more about it. Pretty fun/novel way of solving this problem!
Quik is insane, because I don't have to do anything, and am now compatible with Internet Explorer, in a secure way. Being able to take a modern web stack, and have, "IE compatibility" as a feature, is totally attractive to old-school enterprises, when that's your target clientele.