It seems like minimal interaction, but I kind of feel like all those decks do it change the onus of interaction from the Runner to the Corp. Part of the interesting bit of facing this as a Corp might be doing things that force the runner to abandon their plan and deal with whatever you're doing.
Specifically talking about the new SIphon/DLR decks (since I have some actual experience with them), If the Corp can maintain money decently well, the DLR decks loses a fair bit of teeth - you can actually spend the time and money to trash their relevant bits. You probably bankrupt yourself in the process, but if it ends the threat, you're probably in OK shape. If it can rush out fast enough, it forces the Runner to respond in a more conventional method or risk losing before he can get set up.
I think they just offer a new way to play that's pretty interesting and new. And this kind of solo deck existed before with John Masanori and DLR, as well as the Noise deck that uses Hivemind, Chakana, etc.