Back in the days when we created full flash sites, it was considered to be a best practice to create an HTML version of the site as a fallback, so people without flash could use it too. This practice was not used often, but the sites that did, still work today, on all current devices. Back when we created these sites, we thought the fallbacks would be used less and less in the future: everybody would have Flash in a few years time. This idea turned out to be false. We could not imagine a future where Flash would be gone.
Imagining the future is hard