Yeah the search persistence is the only one that raised an eyebrow for me. I think it’s cool as long as is easy and obvious to get url if you want.
The @keyword thing seems cool to me. I use the various shortcuts (random symbols) for those occasionally and have to relook them up so a slightly longer but easier to remember alternative seems like it would be nice.
It’s even more complicated than that, because for full accuracy, it must also emulate the clock speed at which the emulated processor ran, as well as the various memory busses etc