Unfortunately, there are many out there that believe this sort of functionality is essential these days. BUT those of us that have dealt with MC over a very long period, know that their decoders generally do not have spare processor capacity to do all sorts of non-MC required extras, and as they add more features and services, every one of their previous decoders starts struggling more and more.
In any case, those that want to browse the Internet on their TVs should get themselves a Smart TV.
I think we will differ slightly on whether it is well designed with good software. Generally speaking though it seems to do the job MC intended it to do, even though there are enough bugs and issues to keep them busy for a while yet.
What we all miss on the Explora is the dual view capability of the SD PVR, and the record 2 capability that the 4 tuner HD PVRs have.
One technical design issue is that the last decoder to have a truly decent RF modulator in it was/is the SD PVR. However, the one currently used in the Explora meets "International Standards" (whatever that is supposed to mean).