Yeah I’m not holding my breath. It will be around for a long time.
A couple of things I could see changing that would be a) Microsoft in financial trouble, b) AI both making it harder to keep up with security bugs, and making it easier to migrate away from legacy systems.
The chances of .net framework being among the first to go is slim though.
On your first question: the current law is that DST is optional, but if a state opts out, they have to be on standard time. The new bill allows them to stay on DST permanently and removes the ability for states to opt-out unless they are already on year-round standard time. So, if this passes, every state in the union will be on either standard time or DST, depending on their status before, with no option to either go back to standard time nor to go back to changing twice a year.