Would you be shocked to learn that Isaac didn't in fact make the client?

I find we might of all knew that, sire. Isaac does not like to make the effort and finds it rather fitting to reuse things he used 5 - 6 years ago.

I mean that is smart tho

Reusing assets is a good marketing strategy to save money but it isn't a good 'advertisement' benefit, you use the same product as such for games like GTA many assets were reused, but a lot of them were lower assets so like bins and smaller details, but if you start to reuse big things as such Isaac did, you might start to get players losing interest if you don't add spectacular content to it, sire.